Issue #1751 -- Remove XP_MACOSX conditionals from /dom

71 files changed, 109 insertions, 5351 deletions

diff --git a/dom/base/Navigator.cpp b/dom/base/Navigator.cpp
index c0580c3590..e15e32d328 100644
--- a/dom/base/Navigator.cpp
+++ b/dom/base/Navigator.cpp
@@ -1407,12 +1407,6 @@ Navigator::GetPlatform(nsAString& aPlatform, bool aUsePrefOverriddenValue)
   aPlatform.AssignLiteral("Win64");
 #elif defined(WIN32)
   aPlatform.AssignLiteral("Win32");
-#elif defined(XP_MACOSX) && defined(__ppc__)
-  aPlatform.AssignLiteral("MacPPC");
-#elif defined(XP_MACOSX) && defined(__i386__)
-  aPlatform.AssignLiteral("MacIntel");
-#elif defined(XP_MACOSX) && defined(__x86_64__)
-  aPlatform.AssignLiteral("MacIntel");
 #else
   // XXX Communicator uses compiled-in build-time string defines
   // to indicate the platform it was compiled *for*, not what it is
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 7dc6ccb990..95f176ca8f 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -6842,10 +6842,6 @@ nsContentUtils::HaveEqualPrincipals(nsIDocument* aDoc1, nsIDocument* aDoc2)
 bool
 nsContentUtils::HasPluginWithUncontrolledEventDispatch(nsIContent* aContent)
 {
-#ifdef XP_MACOSX
-  // We control dispatch to all mac plugins.
-  return false;
-#else
   if (!aContent || !aContent->IsInUncomposedDoc()) {
     return false;
   }
@@ -6868,7 +6864,6 @@ nsContentUtils::HasPluginWithUncontrolledEventDispatch(nsIContent* aContent)
   }
 
   return !isWindowless;
-#endif
 }
 
 /* static */
diff --git a/dom/base/nsFocusManager.cpp b/dom/base/nsFocusManager.cpp
index 637e3954e1..bfd2e334ea 100644
--- a/dom/base/nsFocusManager.cpp
+++ b/dom/base/nsFocusManager.cpp
@@ -66,9 +66,7 @@
 #include "nsAccessibilityService.h"
 #endif
 
-#ifndef XP_MACOSX
 #include "nsIScriptError.h"
-#endif
 
 using namespace mozilla;
 using namespace mozilla::dom;
@@ -1270,12 +1268,10 @@ nsFocusManager::SetFocusInner(nsIContent* aNewContent, int32_t aFlags,
     }
   }
 
-  // Exit fullscreen if we're focusing a windowed plugin on a non-MacOSX
-  // system. We don't control event dispatch to windowed plugins on non-MacOSX,
-  // so we can't display the "Press ESC to leave fullscreen mode" warning on
-  // key input if a windowed plugin is focused, so just exit fullscreen
-  // to guard against phishing.
-#ifndef XP_MACOSX
+  // Exit fullscreen if we're focusing a windowed plugin. We don't control
+  // event dispatch to windowed plugins, so we can't display the <Press ESC
+  // to leave fullscreen mode> warning on key input if a windowed plugin is
+  // focused, so just exit fullscreen to guard against phishing.
   if (contentToFocus &&
       nsContentUtils::
         GetRootDocument(contentToFocus->OwnerDoc())->GetFullscreenElement() &&
@@ -1287,7 +1283,6 @@ nsFocusManager::SetFocusInner(nsIContent* aNewContent, int32_t aFlags,
                                     "FocusedWindowedPluginWhileFullscreen");
     nsIDocument::AsyncExitFullscreen(contentToFocus->OwnerDoc());
   }
-#endif
 
   // if the FLAG_NOSWITCHFRAME flag is used, only allow the focus to be
   // shifted away from the current element if the new shell to focus is
diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index a09847820b..293a522efe 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -6254,18 +6254,7 @@ nsGlobalWindow::CheckSecurityLeftAndTop(int32_t* aLeft, int32_t* aTop, bool aCal
       screen->GetAvailLeft(&screenLeft);
       screen->GetAvailWidth(&screenWidth);
       screen->GetAvailHeight(&screenHeight);
-#if defined(XP_MACOSX)
-      /* The mac's coordinate system is different from the assumed Windows'
-         system. It offsets by the height of the menubar so that a window
-         placed at (0,0) will be entirely visible. Unfortunately that
-         correction is made elsewhere (in Widget) and the meaning of
-         the Avail... coordinates is overloaded. Here we allow a window
-         to be placed at (0,0) because it does make sense to do so.
-      */
-      screen->GetTop(&screenTop);
-#else
       screen->GetAvailTop(&screenTop);
-#endif
 
       if (aLeft) {
         if (screenLeft+screenWidth < *aLeft+winWidth)
@@ -7103,16 +7092,6 @@ nsGlobalWindow::Dump(const nsAString& aStr)
 
   char *cstr = ToNewUTF8String(aStr);
 
-#if defined(XP_MACOSX)
-  // have to convert \r to \n so that printing to the console works
-  char *c = cstr, *cEnd = cstr + strlen(cstr);
-  while (c < cEnd) {
-    if (*c == '\r')
-      *c = '\n';
-    c++;
-  }
-#endif
-
   if (cstr) {
     MOZ_LOG(nsContentUtils::DOMDumpLog(), LogLevel::Debug, ("[Window.Dump] %s", cstr));
 #ifdef XP_WIN
diff --git a/dom/base/nsJSEnvironment.cpp b/dom/base/nsJSEnvironment.cpp
index 5382f4494f..3b2a1cb19f 100644
--- a/dom/base/nsJSEnvironment.cpp
+++ b/dom/base/nsJSEnvironment.cpp
@@ -60,10 +60,6 @@
 
 #include "nsJSPrincipals.h"
 
-#ifdef XP_MACOSX
-// AssertMacros.h defines 'check' and conflicts with AccessCheck.h
-#undef check
-#endif
 #include "AccessCheck.h"
 
 #include "mozilla/Logging.h"
diff --git a/dom/base/nsObjectLoadingContent.cpp b/dom/base/nsObjectLoadingContent.cpp
index e508a22f3e..27e4e7b7e9 100644
--- a/dom/base/nsObjectLoadingContent.cpp
+++ b/dom/base/nsObjectLoadingContent.cpp
@@ -95,13 +95,6 @@
 #endif
 #endif // XP_WIN
 
-#ifdef XP_MACOSX
-// HandlePluginCrashed() and HandlePluginInstantiated() needed from here to
-// fix bug 1147521.  Should later be replaced by proper interface methods,
-// maybe on nsIObjectLoadingContext.
-#include "mozilla/dom/HTMLObjectElement.h"
-#endif
-
 static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
 
 static const char *kPrefJavaMIME = "plugin.java.mime";
@@ -916,10 +909,6 @@ nsObjectLoadingContent::InstantiatePluginInstance(bool aIsLoading)
                             NS_LITERAL_STRING("PluginInstantiated"));
   NS_DispatchToCurrentThread(ev);
 
-#ifdef XP_MACOSX
-  HTMLObjectElement::HandlePluginInstantiated(thisContent->AsElement());
-#endif
-
   return NS_OK;
 }
 
@@ -2948,10 +2937,6 @@ nsObjectLoadingContent::PluginCrashed(nsIPluginTag* aPluginTag,
   nsCOMPtr<nsIContent> thisContent =
     do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
 
-#ifdef XP_MACOSX
-  HTMLObjectElement::HandlePluginCrashed(thisContent->AsElement());
-#endif
-
   PluginDestroyed();
 
   // Switch to fallback/crashed state, notify
@@ -3190,10 +3175,6 @@ nsObjectLoadingContent::DoStopPlugin(nsPluginInstanceOwner* aInstanceOwner,
       return;
     }
 
-#if defined(XP_MACOSX)
-    aInstanceOwner->HidePluginWindow();
-#endif
-
     RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
     NS_ASSERTION(pluginHost, "No plugin host?");
     pluginHost->StopPluginInstance(inst);
diff --git a/dom/base/nsWindowRoot.cpp b/dom/base/nsWindowRoot.cpp
index 8175877148..30360eb1f4 100644
--- a/dom/base/nsWindowRoot.cpp
+++ b/dom/base/nsWindowRoot.cpp
@@ -37,14 +37,8 @@ nsWindowRoot::nsWindowRoot(nsPIDOMWindowOuter* aWindow)
   mWindow = aWindow;
   MOZ_ASSERT(mWindow->IsOuterWindow());
 
-  // Keyboard indicators are not shown on Mac by default.
-#if defined(XP_MACOSX)
-  mShowAccelerators = false;
-  mShowFocusRings = false;
-#else
   mShowAccelerators = true;
   mShowFocusRings = true;
-#endif
 }
 
 nsWindowRoot::~nsWindowRoot()
diff --git a/dom/canvas/WebGL2Context.cpp b/dom/canvas/WebGL2Context.cpp
index f9a1eba4bf..e88e22e861 100644
--- a/dom/canvas/WebGL2Context.cpp
+++ b/dom/canvas/WebGL2Context.cpp
@@ -126,13 +126,6 @@ WebGLContext::InitWebGL2(FailureReason* const out_failReason)
     fnGatherMissing2(gl::GLFeature::occlusion_query_boolean,
                      gl::GLFeature::occlusion_query);
 
-#ifdef XP_MACOSX
-    // On OSX, GL core profile is used. This requires texture swizzle
-    // support to emulate legacy texture formats: ALPHA, LUMINANCE,
-    // and LUMINANCE_ALPHA.
-    fnGatherMissing(gl::GLFeature::texture_swizzle);
-#endif
-
     fnGatherMissing2(gl::GLFeature::prim_restart_fixed,
                      gl::GLFeature::prim_restart);
 
diff --git a/dom/canvas/WebGLBuffer.cpp b/dom/canvas/WebGLBuffer.cpp
index 02a8f649fe..11d956c8a4 100644
--- a/dom/canvas/WebGLBuffer.cpp
+++ b/dom/canvas/WebGLBuffer.cpp
@@ -115,7 +115,7 @@ WebGLBuffer::BufferData(GLenum target, size_t size, const void* data, GLenum usa
     const ScopedLazyBind lazyBind(gl, target, this);
     mContext->InvalidateBufferFetching();
 
-#if defined(XP_MACOSX) || defined(MOZ_WIDGET_GTK)
+#if defined(MOZ_WIDGET_GTK)
     // bug 790879
     if (gl->WorkAroundDriverBugs() &&
         size > INT32_MAX)
diff --git a/dom/canvas/WebGLContext.h b/dom/canvas/WebGLContext.h
index 0510e6898a..628d4713ca 100644
--- a/dom/canvas/WebGLContext.h
+++ b/dom/canvas/WebGLContext.h
@@ -30,10 +30,6 @@
 #include "ScopedGLHelpers.h"
 #include "TexUnpackBlob.h"
 
-#ifdef XP_MACOSX
-#include "ForceDiscreteGPUHelperCGL.h"
-#endif
-
 // Local
 #include "WebGLContextLossHandler.h"
 #include "WebGLContextUnchecked.h"
@@ -2015,15 +2011,6 @@ protected:
     JSObject* WebGLObjectAsJSObject(JSContext* cx, const WebGLObjectType*,
                                     ErrorResult& rv) const;
 
-#ifdef XP_MACOSX
-    // see bug 713305. This RAII helper guarantees that we're on the discrete GPU, during its lifetime
-    // Debouncing note: we don't want to switch GPUs too frequently, so try to not create and destroy
-    // these objects at high frequency. Having WebGLContext's hold one such object seems fine,
-    // because WebGLContext objects only go away during GC, which shouldn't happen too frequently.
-    // If in the future GC becomes much more frequent, we may have to revisit then (maybe use a timer).
-    ForceDiscreteGPUHelperCGL mForceDiscreteGPUHelper;
-#endif
-
 public:
     // console logging helpers
     void GenerateWarning(const char* fmt, ...);
diff --git a/dom/canvas/WebGLContextBuffers.cpp b/dom/canvas/WebGLContextBuffers.cpp
index e787b99143..6f583c10c6 100644
--- a/dom/canvas/WebGLContextBuffers.cpp
+++ b/dom/canvas/WebGLContextBuffers.cpp
@@ -295,16 +295,6 @@ WebGLContext::BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
 
     ////
 
-#ifdef XP_MACOSX
-    if (buffer && buffer->Content() == WebGLBuffer::Kind::Undefined &&
-        gl->WorkAroundDriverBugs())
-    {
-        // BindBufferRange will fail if the buffer's contents is undefined.
-        // Bind so driver initializes the buffer.
-        gl->fBindBuffer(target, buffer->mGLName);
-    }
-#endif
-
     gl->fBindBufferRange(target, index, buffer ? buffer->mGLName : 0, offset, size);
 
     ////
@@ -352,12 +342,6 @@ WebGLContext::BufferData(GLenum target, WebGLsizeiptr size, GLenum usage)
     if (!checkedSize.isValid())
       return ErrorOutOfMemory("%s: Size too large for platform.", funcName);
      
-#if defined(XP_MACOSX)
-    if (gl->WorkAroundDriverBugs() && size > 1200000000) {
-      return ErrorOutOfMemory("Allocations larger than 1200000000 fail on MacOS.");
-    }
-#endif
-
     const UniqueBuffer zeroBuffer(calloc(size, 1));
     if (!zeroBuffer)
         return ErrorOutOfMemory("%s: Failed to allocate zeros.", funcName);
diff --git a/dom/canvas/WebGLContextDraw.cpp b/dom/canvas/WebGLContextDraw.cpp
index fd9ee49579..8e437a07f3 100644
--- a/dom/canvas/WebGLContextDraw.cpp
+++ b/dom/canvas/WebGLContextDraw.cpp
@@ -1045,13 +1045,6 @@ WebGLContext::WhatDoesVertexAttrib0Need() const
     const auto& isAttribArray0Enabled = mBoundVertexArray->mAttribs[0].mEnabled;
 
     bool legacyAttrib0 = gl->IsCompatibilityProfile();
-#ifdef XP_MACOSX
-    if (gl->WorkAroundDriverBugs()) {
-        // Failures in conformance/attribs/gl-disabled-vertex-attrib.
-        // Even in Core profiles on NV. Sigh.
-        legacyAttrib0 |= (gl->Vendor() == gl::GLVendor::NVIDIA);
-    }
-#endif
 
     if (!legacyAttrib0)
         return WebGLVertexAttrib0Status::Default;
diff --git a/dom/canvas/WebGLContextValidate.cpp b/dom/canvas/WebGLContextValidate.cpp
index 30d4c65221..60bb3a32cc 100644
--- a/dom/canvas/WebGLContextValidate.cpp
+++ b/dom/canvas/WebGLContextValidate.cpp
@@ -695,18 +695,6 @@ WebGLContext::InitAndValidateGL(FailureReason* const out_failReason)
         gl->fEnable(LOCAL_GL_PROGRAM_POINT_SIZE);
     }
 
-#ifdef XP_MACOSX
-    if (gl->WorkAroundDriverBugs() &&
-        gl->Vendor() == gl::GLVendor::ATI &&
-        !nsCocoaFeatures::IsAtLeastVersion(10,9))
-    {
-        // The Mac ATI driver, in all known OSX version up to and including
-        // 10.8, renders points sprites upside-down. (Apple bug 11778921)
-        gl->fPointParameterf(LOCAL_GL_POINT_SPRITE_COORD_ORIGIN,
-                             LOCAL_GL_LOWER_LEFT);
-    }
-#endif
-
     if (gl->IsSupported(gl::GLFeature::seamless_cube_map_opt_in)) {
         gl->fEnable(LOCAL_GL_TEXTURE_CUBE_MAP_SEAMLESS);
     }
diff --git a/dom/canvas/WebGLProgram.cpp b/dom/canvas/WebGLProgram.cpp
index 9b204358bb..1ff27e1d2f 100644
--- a/dom/canvas/WebGLProgram.cpp
+++ b/dom/canvas/WebGLProgram.cpp
@@ -689,24 +689,6 @@ WebGLProgram::GetFragDataLocation(const nsAString& userName_wide) const
     gl->MakeCurrent();
 
     const NS_LossyConvertUTF16toASCII userName(userName_wide);
-#ifdef XP_MACOSX
-    if (gl->WorkAroundDriverBugs()) {
-        // OSX doesn't return locs for indexed names, just the base names.
-        // Indicated by failure in: conformance2/programs/gl-get-frag-data-location.html
-        bool isArray;
-        size_t arrayIndex;
-        nsCString baseUserName;
-        if (!ParseName(userName, &baseUserName, &isArray, &arrayIndex))
-            return -1;
-
-        if (arrayIndex >= mContext->mImplMaxDrawBuffers)
-            return -1;
-
-        const auto baseLoc = GetFragDataByUserName(this, baseUserName);
-        const auto loc = baseLoc + GLint(arrayIndex);
-        return loc;
-    }
-#endif
     return GetFragDataByUserName(this, userName);
 }
 
@@ -770,11 +752,6 @@ WebGLProgram::GetProgramParameter(GLenum pname) const
         return JS::BooleanValue(IsLinked());
 
     case LOCAL_GL_VALIDATE_STATUS:
-#ifdef XP_MACOSX
-        // See comment in ValidateProgram.
-        if (gl->WorkAroundDriverBugs())
-            return JS::BooleanValue(true);
-#endif
         // Todo: Implement this in our code.
         return JS::BooleanValue(bool(GetProgramiv(gl, mGLName, pname)));
 
@@ -1377,17 +1354,6 @@ WebGLProgram::ValidateProgram() const
 {
     mContext->MakeContextCurrent();
     gl::GLContext* gl = mContext->gl;
-
-#ifdef XP_MACOSX
-    // See bug 593867 for NVIDIA and bug 657201 for ATI. The latter is confirmed
-    // with Mac OS 10.6.7.
-    if (gl->WorkAroundDriverBugs()) {
-        mContext->GenerateWarning("validateProgram: Implemented as a no-op on"
-                                  " Mac to work around crashes.");
-        return;
-    }
-#endif
-
     gl->fValidateProgram(mGLName);
 }
 
diff --git a/dom/canvas/WebGLShaderValidator.cpp b/dom/canvas/WebGLShaderValidator.cpp
index bf2df82f71..eadeeb56b0 100644
--- a/dom/canvas/WebGLShaderValidator.cpp
+++ b/dom/canvas/WebGLShaderValidator.cpp
@@ -63,34 +63,8 @@ ChooseValidatorCompileOptions(const ShBuiltInResources& resources,
                SH_REGENERATE_STRUCT_NAMES;
     }
 
-#ifndef XP_MACOSX
-    // We want to do this everywhere, but to do this on Mac, we need
-    // to do it only on Mac OSX > 10.6 as this causes the shader
-    // compiler in 10.6 to crash
+    // We want to do this everywhere.
     options |= SH_CLAMP_INDIRECT_ARRAY_BOUNDS;
-#endif
-
-#ifdef XP_MACOSX
-    if (gl->WorkAroundDriverBugs()) {
-        // Work around https://bugs.webkit.org/show_bug.cgi?id=124684,
-        // https://chromium.googlesource.com/angle/angle/+/5e70cf9d0b1bb
-        options |= SH_UNFOLD_SHORT_CIRCUIT;
-        
-        // OS X 10.7/10.8 specific:
-        
-        // Work around bug 665578 and bug 769810
-        if (gl->Vendor() == gl::GLVendor::ATI) {
-            options |= SH_EMULATE_BUILT_IN_FUNCTIONS;
-        }
-        // Work around bug 735560
-        if (gl->Vendor() == gl::GLVendor::Intel) {
-            options |= SH_EMULATE_BUILT_IN_FUNCTIONS;
-        }
-
-        // Work around that Mac drivers handle struct scopes incorrectly.
-        options |= SH_REGENERATE_STRUCT_NAMES;
-    }
-#endif
 
     if (resources.MaxExpressionComplexity > 0) {
         options |= SH_LIMIT_EXPRESSION_COMPLEXITY;
@@ -187,15 +161,6 @@ WebGLContext::CreateShaderValidator(GLenum shaderType) const
     // If underlying GLES doesn't have highp in frag shaders, it should complain anyways.
     resources.FragmentPrecisionHigh = mDisableFragHighP ? 0 : 1;
 
-    if (gl->WorkAroundDriverBugs()) {
-#ifdef XP_MACOSX
-        if (gl->Vendor() == gl::GLVendor::NVIDIA) {
-            // Work around bug 890432
-            resources.MaxExpressionComplexity = 1000;
-        }
-#endif
-    }
-
     int compileOptions = webgl::ChooseValidatorCompileOptions(resources, gl);
     return webgl::ShaderValidator::Create(shaderType, spec, outputLanguage, resources,
                                           compileOptions);
diff --git a/dom/events/EventStateManager.cpp b/dom/events/EventStateManager.cpp
index c8f1acdb55..87c4827fab 100644
--- a/dom/events/EventStateManager.cpp
+++ b/dom/events/EventStateManager.cpp
@@ -95,10 +95,6 @@
 #include "Units.h"
 #include "mozilla/layers/APZCTreeManager.h"
 
-#ifdef XP_MACOSX
-#import <ApplicationServices/ApplicationServices.h>
-#endif
-
 namespace mozilla {
 
 using namespace dom;
@@ -1517,14 +1513,6 @@ EventStateManager::FireContextClick()
     return;
   }
 
-#ifdef XP_MACOSX
-  // Hack to ensure that we don't show a context menu when the user
-  // let go of the mouse after a long cpu-hogging operation prevented
-  // us from handling any OS events. See bug 117589.
-  if (!CGEventSourceButtonState(kCGEventSourceStateCombinedSessionState, kCGMouseButtonLeft))
-    return;
-#endif
-
   nsEventStatus status = nsEventStatus_eIgnore;
 
   // Dispatch to the DOM. We have to fake out the ESM and tell it that the
@@ -2841,29 +2829,6 @@ EventStateManager::DecideGestureEvent(WidgetGestureNotifyEvent* aEvent,
   aEvent->mPanDirection = panDirection;
 }
 
-#ifdef XP_MACOSX
-static bool
-NodeAllowsClickThrough(nsINode* aNode)
-{
-  while (aNode) {
-    if (aNode->IsXULElement()) {
-      mozilla::dom::Element* element = aNode->AsElement();
-      static nsIContent::AttrValuesArray strings[] =
-        {&nsGkAtoms::always, &nsGkAtoms::never, nullptr};
-      switch (element->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::clickthrough,
-                                       strings, eCaseMatters)) {
-        case 0:
-          return true;
-        case 1:
-          return false;
-      }
-    }
-    aNode = nsContentUtils::GetCrossDocParentNode(aNode);
-  }
-  return true;
-}
-#endif
-
 void
 EventStateManager::PostHandleKeyboardEvent(WidgetKeyboardEvent* aKeyboardEvent,
                                            nsEventStatus& aStatus,
@@ -3096,10 +3061,7 @@ EventStateManager::PostHandleEvent(nsPresContext* aPresContext,
             // focused frame
             EnsureDocument(mPresContext);
             if (mDocument) {
-#ifdef XP_MACOSX
-              if (!activeContent || !activeContent->IsXULElement())
-#endif
-                fm->ClearFocus(mDocument->GetWindow());
+              fm->ClearFocus(mDocument->GetWindow());
               fm->SetFocusedWindow(mDocument->GetWindow());
             }
           }
@@ -3511,18 +3473,6 @@ EventStateManager::PostHandleEvent(nsPresContext* aPresContext,
     }
     break;
 
-#ifdef XP_MACOSX
-  case eMouseActivate:
-    if (mCurrentTarget) {
-      nsCOMPtr<nsIContent> targetContent;
-      mCurrentTarget->GetContentForEvent(aEvent, getter_AddRefs(targetContent));
-      if (!NodeAllowsClickThrough(targetContent)) {
-        *aStatus = nsEventStatus_eConsumeNoDefault;
-      }
-    }
-    break;
-#endif
-
   default:
     break;
   }
diff --git a/dom/events/TextComposition.cpp b/dom/events/TextComposition.cpp
index bd7ebbc468..3b3dc6505b 100644
--- a/dom/events/TextComposition.cpp
+++ b/dom/events/TextComposition.cpp
@@ -21,21 +21,8 @@
 #include "mozilla/Unused.h"
 #include "mozilla/dom/TabParent.h"
 
-#ifdef XP_MACOSX
-// Some defiens will be conflict with OSX SDK
-#define TextRange _TextRange
-#define TextRangeArray _TextRangeArray
-#define Comment _Comment
-#endif
-
 #include "nsPluginInstanceOwner.h"
 
-#ifdef XP_MACOSX
-#undef TextRange
-#undef TextRangeArray
-#undef Comment
-#endif
-
 using namespace mozilla::widget;
 
 namespace mozilla {
diff --git a/dom/html/HTMLButtonElement.cpp b/dom/html/HTMLButtonElement.cpp
index e493d1891d..80df5bc740 100644
--- a/dom/html/HTMLButtonElement.cpp
+++ b/dom/html/HTMLButtonElement.cpp
@@ -156,11 +156,7 @@ HTMLButtonElement::IsHTMLFocusable(bool aWithMouse, bool *aIsFocusable, int32_t
     return true;
   }
 
-  *aIsFocusable = 
-#ifdef XP_MACOSX
-    (!aWithMouse || nsFocusManager::sMouseFocusesFormControl) &&
-#endif
-    !IsDisabled();
+  *aIsFocusable = !IsDisabled();
 
   return false;
 }
diff --git a/dom/html/HTMLImageElement.cpp b/dom/html/HTMLImageElement.cpp
index 5e75d09349..cb586d68ac 100644
--- a/dom/html/HTMLImageElement.cpp
+++ b/dom/html/HTMLImageElement.cpp
@@ -599,9 +599,6 @@ HTMLImageElement::IsHTMLFocusable(bool aWithMouse,
   }
 
   *aIsFocusable =
-#ifdef XP_MACOSX
-    (!aWithMouse || nsFocusManager::sMouseFocusesFormControl) &&
-#endif
     (tabIndex >= 0 || HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex));
 
   return false;
diff --git a/dom/html/HTMLInputElement.cpp b/dom/html/HTMLInputElement.cpp
index 557e673e15..8cc25d064a 100644
--- a/dom/html/HTMLInputElement.cpp
+++ b/dom/html/HTMLInputElement.cpp
@@ -3566,7 +3566,7 @@ HTMLInputElement::Focus(ErrorResult& aError)
   return;
 }
 
-#if !defined(ANDROID) && !defined(XP_MACOSX)
+#if !defined(ANDROID)
 bool
 HTMLInputElement::IsNodeApzAwareInternal() const
 {
@@ -4728,7 +4728,7 @@ HTMLInputElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
           }
           break;
         }
-#if !defined(ANDROID) && !defined(XP_MACOSX)
+#if !defined(ANDROID)
         case eWheel: {
           // Handle wheel events as increasing / decreasing the input element's
           // value when it's focused and it's type is number or range.
@@ -6665,7 +6665,7 @@ FireEventForAccessibility(nsIDOMHTMLInputElement* aTarget,
 void
 HTMLInputElement::UpdateApzAwareFlag()
 {
-#if !defined(ANDROID) && !defined(XP_MACOSX)
+#if !defined(ANDROID)
   if ((mType == NS_FORM_INPUT_NUMBER) || (mType == NS_FORM_INPUT_RANGE)) {
     SetMayBeApzAware();
   }
@@ -7239,11 +7239,7 @@ HTMLInputElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable, int32_t*
     return false;
   }
 
-#ifdef XP_MACOSX
-  const bool defaultFocusable = !aWithMouse || nsFocusManager::sMouseFocusesFormControl;
-#else
   const bool defaultFocusable = true;
-#endif
 
   if (mType == NS_FORM_INPUT_FILE ||
       mType == NS_FORM_INPUT_NUMBER ||
diff --git a/dom/html/HTMLInputElement.h b/dom/html/HTMLInputElement.h
index 16651d5200..275d80b3a4 100644
--- a/dom/html/HTMLInputElement.h
+++ b/dom/html/HTMLInputElement.h
@@ -137,7 +137,7 @@ public:
   virtual void Focus(ErrorResult& aError) override;
 
   // nsINode
-#if !defined(ANDROID) && !defined(XP_MACOSX)
+#if !defined(ANDROID)
   virtual bool IsNodeApzAwareInternal() const override;
 #endif
 
diff --git a/dom/html/HTMLObjectElement.cpp b/dom/html/HTMLObjectElement.cpp
index 496080c11b..e0e79b69af 100644
--- a/dom/html/HTMLObjectElement.cpp
+++ b/dom/html/HTMLObjectElement.cpp
@@ -18,11 +18,6 @@
 #include "nsNPAPIPluginInstance.h"
 #include "nsIWidget.h"
 #include "nsContentUtils.h"
-#ifdef XP_MACOSX
-#include "mozilla/EventDispatcher.h"
-#include "mozilla/dom/Event.h"
-#include "nsFocusManager.h"
-#endif
 
 namespace mozilla {
 namespace dom {
@@ -44,9 +39,6 @@ HTMLObjectElement::HTMLObjectElement(already_AddRefed<mozilla::dom::NodeInfo>& a
 
 HTMLObjectElement::~HTMLObjectElement()
 {
-#ifdef XP_MACOSX
-  OnFocusBlurPlugin(this, false);
-#endif
   UnregisterActivityObserver();
   DestroyImageLoadingContent();
 }
@@ -117,131 +109,6 @@ NS_IMPL_ELEMENT_CLONE(HTMLObjectElement)
 // nsIConstraintValidation
 NS_IMPL_NSICONSTRAINTVALIDATION(HTMLObjectElement)
 
-#ifdef XP_MACOSX
-
-static nsIWidget* GetWidget(Element* aElement)
-{
-  return nsContentUtils::WidgetForDocument(aElement->OwnerDoc());
-}
-
-Element* HTMLObjectElement::sLastFocused = nullptr; // Weak
-
-class PluginFocusSetter : public Runnable
-{
-public:
-  PluginFocusSetter(nsIWidget* aWidget, Element* aElement)
-  : mWidget(aWidget), mElement(aElement)
-  {
-  }
-
-  NS_IMETHOD Run() override
-  {
-    if (mElement) {
-      HTMLObjectElement::sLastFocused = mElement;
-      bool value = true;
-      mWidget->SetPluginFocused(value);
-    } else if (!HTMLObjectElement::sLastFocused) {
-      bool value = false;
-      mWidget->SetPluginFocused(value);
-    }
-
-    return NS_OK;
-  }
-
-private:
-  nsCOMPtr<nsIWidget> mWidget;
-  nsCOMPtr<Element> mElement;
-};
-
-void
-HTMLObjectElement::OnFocusBlurPlugin(Element* aElement, bool aFocus)
-{
-  // In general we don't want to call nsIWidget::SetPluginFocused() for any
-  // Element that doesn't have a plugin running.  But if SetPluginFocused(true)
-  // was just called for aElement while it had a plugin running, we want to
-  // make sure nsIWidget::SetPluginFocused(false) gets called for it now, even
-  // if aFocus is true.
-  if (aFocus) {
-    nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(aElement);
-    bool hasRunningPlugin = false;
-    if (olc) {
-      // nsIObjectLoadingContent::GetHasRunningPlugin() fails when
-      // nsContentUtils::IsCallerChrome() returns false (which it can do even
-      // when we're processing a trusted focus event).  We work around this by
-      // calling nsObjectLoadingContent::HasRunningPlugin() directly.
-      hasRunningPlugin =
-        static_cast<nsObjectLoadingContent*>(olc.get())->HasRunningPlugin();
-    }
-    if (!hasRunningPlugin) {
-      aFocus = false;
-    }
-  }
-
-  if (aFocus || aElement == sLastFocused) {
-    if (!aFocus) {
-      sLastFocused = nullptr;
-    }
-    nsIWidget* widget = GetWidget(aElement);
-    if (widget) {
-      nsContentUtils::AddScriptRunner(
-        new PluginFocusSetter(widget, aFocus ? aElement : nullptr));
-    }
-  }
-}
-
-void
-HTMLObjectElement::HandlePluginCrashed(Element* aElement)
-{
-  OnFocusBlurPlugin(aElement, false);
-}
-
-void
-HTMLObjectElement::HandlePluginInstantiated(Element* aElement)
-{
-  // If aElement is already focused when a plugin is instantiated, we need
-  // to initiate a call to nsIWidget::SetPluginFocused(true).  Otherwise
-  // keyboard input won't work in a click-to-play plugin until aElement
-  // loses focus and regains it.
-  nsIContent* focusedContent = nullptr;
-  nsFocusManager *fm = nsFocusManager::GetFocusManager();
-  if (fm) {
-    focusedContent = fm->GetFocusedContent();
-  }
-  if (SameCOMIdentity(focusedContent, aElement)) {
-    OnFocusBlurPlugin(aElement, true);
-  }
-}
-
-void
-HTMLObjectElement::HandleFocusBlurPlugin(Element* aElement,
-                                         WidgetEvent* aEvent)
-{
-  if (!aEvent->IsTrusted()) {
-    return;
-  }
-  switch (aEvent->mMessage) {
-    case eFocus: {
-      OnFocusBlurPlugin(aElement, true);
-      break;
-    }
-    case eBlur: {
-      OnFocusBlurPlugin(aElement, false);
-      break;
-    }
-    default:
-      break;
-  }
-}
-
-NS_IMETHODIMP
-HTMLObjectElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
-{
-  HandleFocusBlurPlugin(this, aVisitor.mEvent);
-  return NS_OK;
-}
-
-#endif // #ifdef XP_MACOSX
-
 NS_IMETHODIMP
 HTMLObjectElement::GetForm(nsIDOMHTMLFormElement **aForm)
 {
@@ -282,14 +149,6 @@ void
 HTMLObjectElement::UnbindFromTree(bool aDeep,
                                   bool aNullParent)
 {
-#ifdef XP_MACOSX
-  // When a page is reloaded (when an nsIDocument's content is removed), the
-  // focused element isn't necessarily sent an eBlur event. See
-  // nsFocusManager::ContentRemoved(). This means that a widget may think it
-  // still contains a focused plugin when it doesn't -- which in turn can
-  // disable text input in the browser window. See bug 1137229.
-  OnFocusBlurPlugin(this, false);
-#endif
   nsObjectLoadingContent::UnbindFromTree(aDeep, aNullParent);
   nsGenericHTMLFormElement::UnbindFromTree(aDeep, aNullParent);
 }
diff --git a/dom/html/HTMLSharedObjectElement.cpp b/dom/html/HTMLSharedObjectElement.cpp
index f8b795af7d..f0cf4c188c 100644
--- a/dom/html/HTMLSharedObjectElement.cpp
+++ b/dom/html/HTMLSharedObjectElement.cpp
@@ -16,10 +16,6 @@
 #include "nsIScriptError.h"
 #include "nsIWidget.h"
 #include "nsContentUtils.h"
-#ifdef XP_MACOSX
-#include "mozilla/EventDispatcher.h"
-#include "mozilla/dom/Event.h"
-#endif
 #include "mozilla/dom/HTMLObjectElement.h"
 
 
@@ -42,9 +38,6 @@ HTMLSharedObjectElement::HTMLSharedObjectElement(already_AddRefed<mozilla::dom::
 
 HTMLSharedObjectElement::~HTMLSharedObjectElement()
 {
-#ifdef XP_MACOSX
-  HTMLObjectElement::OnFocusBlurPlugin(this, false);
-#endif
   UnregisterActivityObserver();
   DestroyImageLoadingContent();
 }
@@ -96,17 +89,6 @@ NS_INTERFACE_MAP_END_INHERITING(nsGenericHTMLElement)
 
 NS_IMPL_ELEMENT_CLONE(HTMLSharedObjectElement)
 
-#ifdef XP_MACOSX
-
-NS_IMETHODIMP
-HTMLSharedObjectElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
-{
-  HTMLObjectElement::HandleFocusBlurPlugin(this, aVisitor.mEvent);
-  return NS_OK;
-}
-
-#endif // #ifdef XP_MACOSX
-
 void
 HTMLSharedObjectElement::AsyncEventRunning(AsyncEventDispatcher* aEvent)
 {
@@ -148,14 +130,6 @@ void
 HTMLSharedObjectElement::UnbindFromTree(bool aDeep,
                                         bool aNullParent)
 {
-#ifdef XP_MACOSX
-  // When a page is reloaded (when an nsIDocument's content is removed), the
-  // focused element isn't necessarily sent an eBlur event. See
-  // nsFocusManager::ContentRemoved(). This means that a widget may think it
-  // still contains a focused plugin when it doesn't -- which in turn can
-  // disable text input in the browser window. See bug 1137229.
-  HTMLObjectElement::OnFocusBlurPlugin(this, false);
-#endif
   nsObjectLoadingContent::UnbindFromTree(aDeep, aNullParent);
   nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);
 }
diff --git a/dom/html/HTMLSharedObjectElement.h b/dom/html/HTMLSharedObjectElement.h
index e550b9927c..09b44fa115 100644
--- a/dom/html/HTMLSharedObjectElement.h
+++ b/dom/html/HTMLSharedObjectElement.h
@@ -31,11 +31,6 @@ public:
 
   virtual int32_t TabIndexDefault() override;
 
-#ifdef XP_MACOSX
-  // nsIDOMEventTarget
-  NS_IMETHOD PostHandleEvent(EventChainPostVisitor& aVisitor) override;
-#endif
-
   // nsIDOMHTMLAppletElement
   NS_DECL_NSIDOMHTMLAPPLETELEMENT
 
diff --git a/dom/html/HTMLSummaryElement.cpp b/dom/html/HTMLSummaryElement.cpp
index ee3c07b20b..b9de03fd11 100644
--- a/dom/html/HTMLSummaryElement.cpp
+++ b/dom/html/HTMLSummaryElement.cpp
@@ -116,15 +116,8 @@ HTMLSummaryElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
     return disallowOverridingFocusability;
   }
 
-#ifdef XP_MACOSX
-  // The parent does not have strong opinion about the focusability of this main
-  // summary element, but we'd like to override it when mouse clicking on Mac OS
-  // like other form elements.
-  *aIsFocusable = !aWithMouse || nsFocusManager::sMouseFocusesFormControl;
-#else
-  // The main summary element is focusable on other platforms.
+  // The main summary element is focusable on all supported platforms.
   *aIsFocusable = true;
-#endif
 
   // Give a chance to allow the subclass to override aIsFocusable.
   return false;
diff --git a/dom/html/nsGenericHTMLElement.cpp b/dom/html/nsGenericHTMLElement.cpp
index 0f32d8fb42..f7340ed7be 100644
--- a/dom/html/nsGenericHTMLElement.cpp
+++ b/dom/html/nsGenericHTMLElement.cpp
@@ -2170,10 +2170,6 @@ nsGenericHTMLFormElement::IsHTMLFocusable(bool aWithMouse,
     return true;
   }
 
-#ifdef XP_MACOSX
-  *aIsFocusable =
-    (!aWithMouse || nsFocusManager::sMouseFocusesFormControl) && *aIsFocusable;
-#endif
   return false;
 }
 
diff --git a/dom/media/GraphDriver.cpp b/dom/media/GraphDriver.cpp
index e8b71a2318..90680d8c69 100644
--- a/dom/media/GraphDriver.cpp
+++ b/dom/media/GraphDriver.cpp
@@ -14,10 +14,6 @@
 #include "webrtc/MediaEngineWebRTC.h"
 #endif
 
-#ifdef XP_MACOSX
-#include <sys/sysctl.h>
-#endif
-
 extern mozilla::LazyLogModule gMediaStreamGraphLog;
 #define STREAM_LOG(type, msg) MOZ_LOG(gMediaStreamGraphLog, type, msg)
 
@@ -586,32 +582,6 @@ AudioCallbackDriver::~AudioCallbackDriver()
   MOZ_ASSERT(mPromisesForOperation.IsEmpty());
 }
 
-bool IsMacbookOrMacbookAir()
-{
-#ifdef XP_MACOSX
-  size_t len = 0;
-  sysctlbyname("hw.model", NULL, &len, NULL, 0);
-  if (len) {
-    UniquePtr<char[]> model(new char[len]);
-    // This string can be
-    // MacBook%d,%d for a normal MacBook
-    // MacBookPro%d,%d for a MacBook Pro
-    // MacBookAir%d,%d for a Macbook Air
-    sysctlbyname("hw.model", model.get(), &len, NULL, 0);
-    char* substring = strstr(model.get(), "MacBook");
-    if (substring) {
-      const size_t offset = strlen("MacBook");
-      if (strncmp(model.get() + offset, "Air", len - offset) ||
-          isdigit(model[offset + 1])) {
-        return true;
-      }
-    }
-    return false;
-  }
-#endif
-  return false;
-}
-
 void
 AudioCallbackDriver::Init()
 {
@@ -648,13 +618,6 @@ AudioCallbackDriver::Init()
     }
   }
 
-  // Macbook and MacBook air don't have enough CPU to run very low latency
-  // MediaStreamGraphs, cap the minimal latency to 512 frames int this case.
-  if (IsMacbookOrMacbookAir()) {
-    latency_frames = std::max((uint32_t) 512, latency_frames);
-  }
-
-
   input = output;
   input.channels = mInputChannels; // change to support optional stereo capture
 
@@ -1068,44 +1031,6 @@ AudioCallbackDriver::MixerCallback(AudioDataValue* aMixedBuffer,
   NS_WARNING_ASSERTION(written == aFrames - toWrite, "Dropping frames.");
 };
 
-void AudioCallbackDriver::PanOutputIfNeeded(bool aMicrophoneActive)
-{
-#ifdef XP_MACOSX
-  cubeb_device* out;
-  int rv;
-  char name[128];
-  size_t length = sizeof(name);
-
-  rv = sysctlbyname("hw.model", name, &length, NULL, 0);
-  if (rv) {
-    return;
-  }
-
-  if (!strncmp(name, "MacBookPro", 10)) {
-    if (cubeb_stream_get_current_device(mAudioStream, &out) == CUBEB_OK) {
-      // Check if we are currently outputing sound on external speakers.
-      if (!strcmp(out->output_name, "ispk")) {
-        // Pan everything to the right speaker.
-        if (aMicrophoneActive) {
-          if (cubeb_stream_set_panning(mAudioStream, 1.0) != CUBEB_OK) {
-            NS_WARNING("Could not pan audio output to the right.");
-          }
-        } else {
-          if (cubeb_stream_set_panning(mAudioStream, 0.0) != CUBEB_OK) {
-            NS_WARNING("Could not pan audio output to the center.");
-          }
-        }
-      } else {
-        if (cubeb_stream_set_panning(mAudioStream, 0.0) != CUBEB_OK) {
-          NS_WARNING("Could not pan audio output to the center.");
-        }
-      }
-      cubeb_stream_device_destroy(mAudioStream, out);
-    }
-  }
-#endif
-}
-
 void
 AudioCallbackDriver::DeviceChangedCallback() {
   // Tell the audio engine the device has changed, it might want to reset some
@@ -1114,9 +1039,6 @@ AudioCallbackDriver::DeviceChangedCallback() {
   if (mAudioInput) {
     mAudioInput->DeviceChanged();
   }
-#ifdef XP_MACOSX
-  PanOutputIfNeeded(mMicrophoneActive);
-#endif
 }
 
 void
@@ -1125,10 +1047,6 @@ AudioCallbackDriver::SetMicrophoneActive(bool aActive)
   MonitorAutoLock mon(mGraphImpl->GetMonitor());
 
   mMicrophoneActive = aActive;
-
-#ifdef XP_MACOSX
-  PanOutputIfNeeded(mMicrophoneActive);
-#endif
 }
 
 uint32_t
diff --git a/dom/media/GraphDriver.h b/dom/media/GraphDriver.h
index bb4f2689b8..f2a514b328 100644
--- a/dom/media/GraphDriver.h
+++ b/dom/media/GraphDriver.h
@@ -457,11 +457,6 @@ public:
   void CompleteAudioContextOperations(AsyncCubebOperation aOperation);
 private:
   /**
-   * On certain MacBookPro, the microphone is located near the left speaker.
-   * We need to pan the sound output to the right speaker if we are using the
-   * mic and the built-in speaker, or we will have terrible echo.  */
-  void PanOutputIfNeeded(bool aMicrophoneActive);
-  /**
    * This is called when the output device used by the cubeb stream changes. */
   void DeviceChangedCallback();
   /* Start the cubeb stream */
diff --git a/dom/media/eme/MediaKeySystemAccessManager.cpp b/dom/media/eme/MediaKeySystemAccessManager.cpp
index ed31059e22..a1e1254ad4 100644
--- a/dom/media/eme/MediaKeySystemAccessManager.cpp
+++ b/dom/media/eme/MediaKeySystemAccessManager.cpp
@@ -14,9 +14,6 @@
 #ifdef XP_WIN
 #include "mozilla/WindowsVersion.h"
 #endif
-#ifdef XP_MACOSX
-#include "nsCocoaFeatures.h"
-#endif
 #include "nsPrintfCString.h"
 
 namespace mozilla {
diff --git a/dom/media/gmp/GMPChild.cpp b/dom/media/gmp/GMPChild.cpp
index fa6f2f4c83..eb18037364 100644
--- a/dom/media/gmp/GMPChild.cpp
+++ b/dom/media/gmp/GMPChild.cpp
@@ -112,14 +112,12 @@ GetPluginFile(const nsAString& aPluginPath,
   nsAutoString baseName;
   GetFileBase(aPluginPath, aLibDirectory, aLibFile, baseName);
 
-#if defined(XP_MACOSX)
-  nsAutoString binaryName = NS_LITERAL_STRING("lib") + baseName + NS_LITERAL_STRING(".dylib");
-#elif defined(OS_POSIX)
+#if defined(OS_POSIX)
   nsAutoString binaryName = NS_LITERAL_STRING("lib") + baseName + NS_LITERAL_STRING(".so");
 #elif defined(XP_WIN)
   nsAutoString binaryName =                            baseName + NS_LITERAL_STRING(".dll");
 #else
-#error not defined
+#error Unsupported O.S.
 #endif
   aLibFile->AppendRelativePath(binaryName);
   return true;
diff --git a/dom/media/gmp/rlz/GMPDeviceBinding.cpp b/dom/media/gmp/rlz/GMPDeviceBinding.cpp
index 04def8e8e0..0871d2e4ee 100644
--- a/dom/media/gmp/rlz/GMPDeviceBinding.cpp
+++ b/dom/media/gmp/rlz/GMPDeviceBinding.cpp
@@ -32,14 +32,6 @@
 #include "windows.h"
 #endif
 
-#ifdef XP_MACOSX
-#include <assert.h>
-#ifdef HASH_NODE_ID_WITH_DEVICE_ID
-#include <unistd.h>
-#include <mach/mach.h>
-#include <mach/mach_vm.h>
-#endif
-#endif
 
 #endif // HASH_NODE_ID_WITH_DEVICE_ID
 
@@ -83,46 +75,6 @@ GetStackAfterCurrentFrame(uint8_t** aOutTop, uint8_t** aOutBottom)
 }
 #endif
 
-#if defined(XP_MACOSX) && defined(HASH_NODE_ID_WITH_DEVICE_ID)
-static mach_vm_address_t
-RegionContainingAddress(mach_vm_address_t aAddress)
-{
-  mach_port_t task;
-  kern_return_t kr = task_for_pid(mach_task_self(), getpid(), &task);
-  if (kr != KERN_SUCCESS) {
-    return 0;
-  }
-
-  mach_vm_address_t address = aAddress;
-  mach_vm_size_t size;
-  vm_region_basic_info_data_64_t info;
-  mach_msg_type_number_t count = VM_REGION_BASIC_INFO_COUNT_64;
-  mach_port_t object_name;
-  kr = mach_vm_region(task, &address, &size, VM_REGION_BASIC_INFO_64,
-                      reinterpret_cast<vm_region_info_t>(&info), &count,
-                      &object_name);
-  if (kr != KERN_SUCCESS || size == 0
-      || address > aAddress || address + size <= aAddress) {
-    // mach_vm_region failed, or couldn't find region at given address.
-    return 0;
-  }
-
-  return address;
-}
-
-MOZ_NEVER_INLINE
-static bool
-GetStackAfterCurrentFrame(uint8_t** aOutTop, uint8_t** aOutBottom)
-{
-  mach_vm_address_t stackFrame =
-    reinterpret_cast<mach_vm_address_t>(__builtin_frame_address(0));
-  *aOutTop = reinterpret_cast<uint8_t*>(stackFrame);
-  // Kernel code shows that stack is always a single region.
-  *aOutBottom = reinterpret_cast<uint8_t*>(RegionContainingAddress(stackFrame));
-  return *aOutBottom && (*aOutBottom < *aOutTop);
-}
-#endif
-
 #ifdef HASH_NODE_ID_WITH_DEVICE_ID
 static void SecureMemset(void* start, uint8_t value, size_t size)
 {
diff --git a/dom/media/systemservices/LoadMonitor.cpp b/dom/media/systemservices/LoadMonitor.cpp
index 7a64c4fb0b..ef8d1a0cc7 100644
--- a/dom/media/systemservices/LoadMonitor.cpp
+++ b/dom/media/systemservices/LoadMonitor.cpp
@@ -31,12 +31,6 @@
 #include <unistd.h>
 #endif
 
-#ifdef XP_MACOSX
-#include <mach/mach_host.h>
-#include <mach/mach_init.h>
-#include <mach/host_info.h>
-#endif
-
 #if defined(__DragonFly__) || defined(__FreeBSD__) \
  || defined(__NetBSD__) || defined(__OpenBSD__)
 #include <sys/sysctl.h>
@@ -415,27 +409,6 @@ nsresult RTCLoadInfo::UpdateSystemLoad()
                 cpu_times,
                 &mSystemLoad);
   return NS_OK;
-#elif defined(XP_MACOSX)
-  mach_msg_type_number_t info_cnt = HOST_CPU_LOAD_INFO_COUNT;
-  host_cpu_load_info_data_t load_info;
-  kern_return_t rv = host_statistics(mach_host_self(), HOST_CPU_LOAD_INFO,
-                                     (host_info_t)(&load_info), &info_cnt);
-
-  if (rv != KERN_SUCCESS || info_cnt != HOST_CPU_LOAD_INFO_COUNT) {
-    LOG(("Error from mach/host_statistics call"));
-    return NS_ERROR_FAILURE;
-  }
-
-  const uint64_t cpu_times = load_info.cpu_ticks[CPU_STATE_NICE]
-                           + load_info.cpu_ticks[CPU_STATE_SYSTEM]
-                           + load_info.cpu_ticks[CPU_STATE_USER];
-  const uint64_t total_times = cpu_times + load_info.cpu_ticks[CPU_STATE_IDLE];
-
-  UpdateCpuLoad(mTicksPerInterval,
-                total_times,
-                cpu_times,
-                &mSystemLoad);
-  return NS_OK;
 #elif defined(__DragonFly__) || defined(__FreeBSD__) \
    || defined(__NetBSD__) || defined(__OpenBSD__)
 #if defined(__NetBSD__)
diff --git a/dom/media/webaudio/AudioContext.cpp b/dom/media/webaudio/AudioContext.cpp
index 75f57a630b..3c7958349b 100755
--- a/dom/media/webaudio/AudioContext.cpp
+++ b/dom/media/webaudio/AudioContext.cpp
@@ -873,7 +873,6 @@ AudioContext::OnStateChanged(void* aPromise, AudioContextState aNewState)
   }
 
 #ifndef WIN32 // Bug 1170547
-#ifndef XP_MACOSX
 #ifdef DEBUG
 
   if (!((mAudioContextState == AudioContextState::Suspended &&
@@ -892,7 +891,6 @@ AudioContext::OnStateChanged(void* aPromise, AudioContextState aNewState)
   }
 
 #endif // DEBUG
-#endif // XP_MACOSX
 #endif // WIN32
 
   MOZ_ASSERT(
diff --git a/dom/media/webrtc/MediaEngineCameraVideoSource.cpp b/dom/media/webrtc/MediaEngineCameraVideoSource.cpp
index e1e572724f..e63a9afded 100644
--- a/dom/media/webrtc/MediaEngineCameraVideoSource.cpp
+++ b/dom/media/webrtc/MediaEngineCameraVideoSource.cpp
@@ -339,13 +339,6 @@ MediaEngineCameraVideoSource::SetName(nsString aName)
     facingMode = VideoFacingModeEnum::User;
   }
 #endif // ANDROID
-#ifdef XP_MACOSX
-  // Kludge to test user-facing cameras on OSX.
-  if (aName.Find(NS_LITERAL_STRING("Face")) != -1) {
-    hasFacingMode = true;
-    facingMode = VideoFacingModeEnum::User;
-  }
-#endif
 #ifdef XP_WIN
   // The cameras' name of Surface book are "Microsoft Camera Front" and
   // "Microsoft Camera Rear" respectively.
diff --git a/dom/plugins/base/PluginPRLibrary.cpp b/dom/plugins/base/PluginPRLibrary.cpp
index 57c6c57ab3..e6a202c244 100644
--- a/dom/plugins/base/PluginPRLibrary.cpp
+++ b/dom/plugins/base/PluginPRLibrary.cpp
@@ -24,7 +24,7 @@ static int gNotOptimized;
 using namespace mozilla::layers;
 
 namespace mozilla {
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
 nsresult
 PluginPRLibrary::NP_Initialize(NPNetscapeFuncs* bFuncs,
                                NPPluginFuncs* pFuncs, NPError* error)
@@ -110,7 +110,7 @@ nsresult
 PluginPRLibrary::NP_GetValue(void *future, NPPVariable aVariable,
 			     void *aValue, NPError* error)
 {
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
   if (mNP_GetValue) {
     *error = mNP_GetValue(future, aVariable, aValue);
   } else {
@@ -125,7 +125,7 @@ PluginPRLibrary::NP_GetValue(void *future, NPPVariable aVariable,
 #endif
 }
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
 nsresult
 PluginPRLibrary::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
 {
@@ -231,17 +231,7 @@ PluginPRLibrary::GetImageContainer(NPP instance, ImageContainer** aContainer)
   return NS_ERROR_NOT_IMPLEMENTED;
 }
 
-#if defined(XP_MACOSX)
-nsresult
-PluginPRLibrary::IsRemoteDrawingCoreAnimation(NPP instance, bool *aDrawing)
-{
-  nsNPAPIPluginInstance* inst = (nsNPAPIPluginInstance*)instance->ndata;
-  NS_ENSURE_TRUE(inst, NS_ERROR_NULL_POINTER);
-  *aDrawing = false; 
-  return NS_OK;
-}
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
 nsresult
 PluginPRLibrary::ContentsScaleFactorChanged(NPP instance, double aContentsScaleFactor)
 {
diff --git a/dom/plugins/base/PluginPRLibrary.h b/dom/plugins/base/PluginPRLibrary.h
index ffd3de934e..4934b37bbb 100644
--- a/dom/plugins/base/PluginPRLibrary.h
+++ b/dom/plugins/base/PluginPRLibrary.h
@@ -17,17 +17,17 @@ class PluginPRLibrary : public PluginLibrary
 {
 public:
     PluginPRLibrary(const char* aFilePath, PRLibrary* aLibrary) :
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
         mNP_Initialize(nullptr),
 #else
         mNP_Initialize(nullptr),
 #endif
         mNP_Shutdown(nullptr),
         mNP_GetMIMEDescription(nullptr),
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
         mNP_GetValue(nullptr),
 #endif
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
         mNP_GetEntryPoints(nullptr),
 #endif
         mNPP_New(nullptr),
@@ -60,19 +60,17 @@ public:
 
         mNP_GetMIMEDescription = (NP_GetMIMEDescriptionFunc)
             PR_FindFunctionSymbol(mLibrary, "NP_GetMIMEDescription");
-#ifndef XP_MACOSX
         if (!mNP_GetMIMEDescription)
             return false;
-#endif
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
         mNP_GetValue = (NP_GetValueFunc)
             PR_FindFunctionSymbol(mLibrary, "NP_GetValue");
         if (!mNP_GetValue)
             return false;
 #endif
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
         mNP_GetEntryPoints = (NP_GetEntryPointsFunc)
             PR_FindFunctionSymbol(mLibrary, "NP_GetEntryPoints");
         if (!mNP_GetEntryPoints)
@@ -81,7 +79,7 @@ public:
         return true;
     }
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
     virtual nsresult NP_Initialize(NPNetscapeFuncs* aNetscapeFuncs,
                                    NPPluginFuncs* aFuncs, NPError* aError) override;
 #else
@@ -95,7 +93,7 @@ public:
     virtual nsresult NP_GetValue(void* aFuture, NPPVariable aVariable,
                                  void* aValue, NPError* aError) override;
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
     virtual nsresult NP_GetEntryPoints(NPPluginFuncs* aFuncs, NPError* aError) override;
 #endif
 
@@ -112,10 +110,7 @@ public:
     virtual nsresult GetImageContainer(NPP aInstance, mozilla::layers::ImageContainer** aContainer) override;
     virtual nsresult GetImageSize(NPP aInstance, nsIntSize* aSize) override;
     virtual bool IsOOP() override { return false; }
-#if defined(XP_MACOSX)
-    virtual nsresult IsRemoteDrawingCoreAnimation(NPP aInstance, bool* aDrawing) override;
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     virtual nsresult ContentsScaleFactorChanged(NPP aInstance, double aContentsScaleFactor) override;
 #endif
     virtual nsresult SetBackgroundUnknown(NPP instance) override;
@@ -139,10 +134,10 @@ private:
     NP_InitializeFunc mNP_Initialize;
     NP_ShutdownFunc mNP_Shutdown;
     NP_GetMIMEDescriptionFunc mNP_GetMIMEDescription;
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
     NP_GetValueFunc mNP_GetValue;
 #endif
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
     NP_GetEntryPointsFunc mNP_GetEntryPoints;
 #endif
     NPP_NewProcPtr mNPP_New;
diff --git a/dom/plugins/base/npapi.h b/dom/plugins/base/npapi.h
index aa6a66b2bd..de58f818c4 100644
--- a/dom/plugins/base/npapi.h
+++ b/dom/plugins/base/npapi.h
@@ -22,25 +22,6 @@
 #endif
 #endif
 
-#if defined(__APPLE_CC__) && !defined(XP_UNIX)
-#ifndef XP_MACOSX
-#define XP_MACOSX 1
-#endif
-#endif
-
-#if defined(XP_MACOSX) && defined(__LP64__)
-#define NP_NO_QUICKDRAW
-#define NP_NO_CARBON
-#endif
-
-#if defined(XP_MACOSX)
-#include <ApplicationServices/ApplicationServices.h>
-#include <OpenGL/OpenGL.h>
-#ifndef NP_NO_CARBON
-#include <Carbon/Carbon.h>
-#endif
-#endif
-
 #if defined(XP_UNIX)
 #include <stdio.h>
 #if defined(MOZ_X11)
@@ -117,12 +98,6 @@ typedef char*         NPMIMEType;
 /*                       Structures and definitions                     */
 /*----------------------------------------------------------------------*/
 
-#if !defined(__LP64__)
-#if defined(XP_MACOSX)
-#pragma options align=mac68k
-#endif
-#endif /* __LP64__ */
-
 /*
  *  NPP is a plug-in's opaque instance handle
  */
@@ -280,15 +255,6 @@ typedef struct _NPAudioDeviceChangeDetails
 
 typedef enum {
   NPDrawingModelDUMMY
-#if defined(XP_MACOSX)
-#ifndef NP_NO_QUICKDRAW
-  , NPDrawingModelQuickDraw = 0
-#endif
-  , NPDrawingModelCoreGraphics = 1
-  , NPDrawingModelOpenGL = 2
-  , NPDrawingModelCoreAnimation = 3
-  , NPDrawingModelInvalidatingCoreAnimation = 4
-#endif
 #if defined(XP_WIN)
   , NPDrawingModelSyncWin = 5
 #endif
@@ -301,15 +267,6 @@ typedef enum {
 #endif
 } NPDrawingModel;
 
-#ifdef XP_MACOSX
-typedef enum {
-#ifndef NP_NO_CARBON
-  NPEventModelCarbon = 0,
-#endif
-  NPEventModelCocoa = 1
-} NPEventModel;
-#endif
-
 /*
  *   The following masks are applied on certain platforms to NPNV and
  *   NPPV selectors that pass around pointers to COM interfaces. Newer
@@ -337,12 +294,7 @@ typedef enum {
 #define _NP_ABI_MIXIN_FOR_GCC3 0
 #endif
 
-#if defined(XP_MACOSX)
-#define NP_ABI_MACHO_MASK 0x01000000
-#define _NP_ABI_MIXIN_FOR_MACHO NP_ABI_MACHO_MASK
-#else
 #define _NP_ABI_MIXIN_FOR_MACHO 0
-#endif
 
 #define NP_ABI_MASK (_NP_ABI_MIXIN_FOR_GCC3 | _NP_ABI_MIXIN_FOR_MACHO)
 
@@ -393,12 +345,6 @@ typedef enum {
 
   /* Used for negotiating drawing models */
   NPPVpluginDrawingModel = 1000
-#if defined(XP_MACOSX)
-  /* Used for negotiating event models */
-  , NPPVpluginEventModel = 1001
-  /* In the NPDrawingModelCoreAnimation drawing model, the browser asks the plug-in for a Core Animation layer. */
-  , NPPVpluginCoreAnimationLayer = 1003
-#endif
   /* Notification that the plugin just started or stopped playing audio */
   , NPPVpluginIsPlayingAudio = 4000
 #if defined(XP_WIN)
@@ -442,39 +388,18 @@ typedef enum {
   NPNVCSSZoomFactor = 23,
 
   NPNVpluginDrawingModel = 1000 /* Get the current drawing model (NPDrawingModel) */
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   , NPNVcontentsScaleFactor = 1001
 #endif
-#if defined(XP_MACOSX)
-#ifndef NP_NO_QUICKDRAW
-  , NPNVsupportsQuickDrawBool = 2000
-#endif
-  , NPNVsupportsCoreGraphicsBool = 2001
-  , NPNVsupportsOpenGLBool = 2002
-  , NPNVsupportsCoreAnimationBool = 2003
-  , NPNVsupportsInvalidatingCoreAnimationBool = 2004
-#endif
   , NPNVsupportsAsyncBitmapSurfaceBool = 2007
 #if defined(XP_WIN)
   , NPNVsupportsAsyncWindowsDXGISurfaceBool = 2008
   , NPNVpreferredDXGIAdapter = 2009
 #endif
-#if defined(XP_MACOSX)
-#ifndef NP_NO_CARBON
-  , NPNVsupportsCarbonBool = 3000 /* TRUE if the browser supports the Carbon event model */
-#endif
-  , NPNVsupportsCocoaBool = 3001 /* TRUE if the browser supports the Cocoa event model */
-  , NPNVsupportsUpdatedCocoaTextInputBool = 3002 /* TRUE if the browser supports the updated
-                                                    Cocoa text input specification. */
-#endif
   , NPNVmuteAudioBool = 4000 /* Request that the browser wants to mute or unmute the plugin */
 #if defined(XP_WIN)
   , NPNVaudioDeviceChangeDetails = 4001 /* Provides information about the new default audio device */
 #endif
-#if defined(XP_MACOSX)
-  , NPNVsupportsCompositingCoreAnimationPluginsBool = 74656 /* TRUE if the browser supports
-                                                               CA model compositing */
-#endif
 } NPNVariable;
 
 typedef enum {
@@ -509,7 +434,7 @@ typedef struct _NPWindow
   uint32_t width;  /* Maximum window size */
   uint32_t height;
   NPRect   clipRect; /* Clipping rectangle in port coordinates */
-#if (defined(XP_UNIX) || defined(XP_SYMBIAN)) && !defined(XP_MACOSX)
+#if defined(XP_UNIX) || defined(XP_SYMBIAN)
   void * ws_info; /* Platform-dependent additional data */
 #endif /* XP_UNIX */
   NPWindowType type; /* Is this a window or a drawable? */
@@ -555,11 +480,7 @@ typedef struct _NPPrint
   } print;
 } NPPrint;
 
-#if defined(XP_MACOSX)
-#ifndef NP_NO_CARBON
-typedef EventRecord NPEvent;
-#endif
-#elif defined(XP_SYMBIAN)
+#if defined(XP_SYMBIAN)
 typedef QEvent NPEvent;
 #elif defined(XP_WIN)
 typedef struct _NPEvent
@@ -574,13 +495,7 @@ typedef XEvent NPEvent;
 typedef void*  NPEvent;
 #endif
 
-#if defined(XP_MACOSX)
-typedef void* NPRegion;
-#ifndef NP_NO_QUICKDRAW
-typedef RgnHandle NPQDRegion;
-#endif
-typedef CGPathRef NPCGRegion;
-#elif defined(XP_WIN)
+#if defined(XP_WIN)
 typedef HRGN NPRegion;
 #elif defined(XP_UNIX) && defined(MOZ_X11)
 typedef Region NPRegion;
@@ -594,11 +509,7 @@ typedef struct _NPNSString NPNSString;
 typedef struct _NPNSWindow NPNSWindow;
 typedef struct _NPNSMenu   NPNSMenu;
 
-#if defined(XP_MACOSX)
-typedef NPNSMenu NPMenu;
-#else
 typedef void *NPMenu;
-#endif
 
 typedef enum {
   NPCoordinateSpacePlugin = 1,
@@ -608,112 +519,6 @@ typedef enum {
   NPCoordinateSpaceFlippedScreen
 } NPCoordinateSpace;
 
-#if defined(XP_MACOSX)
-
-#ifndef NP_NO_QUICKDRAW
-typedef struct NP_Port
-{
-  CGrafPtr port;
-  int32_t portx; /* position inside the topmost window */
-  int32_t porty;
-} NP_Port;
-#endif /* NP_NO_QUICKDRAW */
-
-/*
- * NP_CGContext is the type of the NPWindow's 'window' when the plugin specifies NPDrawingModelCoreGraphics
- * as its drawing model.
- */
-
-typedef struct NP_CGContext
-{
-  CGContextRef context;
-  void *window; /* A WindowRef under the Carbon event model. */
-} NP_CGContext;
-
-/*
- * NP_GLContext is the type of the NPWindow's 'window' when the plugin specifies NPDrawingModelOpenGL as its
- * drawing model.
- */
-
-typedef struct NP_GLContext
-{
-  CGLContextObj context;
-#ifdef NP_NO_CARBON
-  NPNSWindow *window;
-#else
-  void *window; /* Can be either an NSWindow or a WindowRef depending on the event model */
-#endif
-} NP_GLContext;
-
-typedef enum {
-  NPCocoaEventDrawRect = 1,
-  NPCocoaEventMouseDown,
-  NPCocoaEventMouseUp,
-  NPCocoaEventMouseMoved,
-  NPCocoaEventMouseEntered,
-  NPCocoaEventMouseExited,
-  NPCocoaEventMouseDragged,
-  NPCocoaEventKeyDown,
-  NPCocoaEventKeyUp,
-  NPCocoaEventFlagsChanged,
-  NPCocoaEventFocusChanged,
-  NPCocoaEventWindowFocusChanged,
-  NPCocoaEventScrollWheel,
-  NPCocoaEventTextInput
-} NPCocoaEventType;
-
-typedef struct _NPCocoaEvent {
-  NPCocoaEventType type;
-  uint32_t version;
-  union {
-    struct {
-      uint32_t modifierFlags;
-      double   pluginX;
-      double   pluginY;
-      int32_t  buttonNumber;
-      int32_t  clickCount;
-      double   deltaX;
-      double   deltaY;
-      double   deltaZ;
-    } mouse;
-    struct {
-      uint32_t    modifierFlags;
-      NPNSString *characters;
-      NPNSString *charactersIgnoringModifiers;
-      NPBool      isARepeat;
-      uint16_t    keyCode;
-    } key;
-    struct {
-      CGContextRef context;
-      double x;
-      double y;
-      double width;
-      double height;
-    } draw;
-    struct {
-      NPBool hasFocus;
-    } focus;
-    struct {
-      NPNSString *text;
-    } text;
-  } data;
-} NPCocoaEvent;
-
-#ifndef NP_NO_CARBON
-/* Non-standard event types that can be passed to HandleEvent */
-enum NPEventType {
-  NPEventType_GetFocusEvent = (osEvt + 16),
-  NPEventType_LoseFocusEvent,
-  NPEventType_AdjustCursorEvent,
-  NPEventType_MenuCommandEvent,
-  NPEventType_ClippingChangedEvent,
-  NPEventType_ScrollingBeginsEvent = 1000,
-  NPEventType_ScrollingEndsEvent
-};
-#endif /* NP_NO_CARBON */
-
-#endif /* XP_MACOSX */
-
 /*
  * Values for mode passed to NPP_New:
  */
@@ -736,12 +541,6 @@ enum NPEventType {
 #define NP_CLEAR_ALL   0
 #define NP_CLEAR_CACHE (1 << 0)
 
-#if !defined(__LP64__)
-#if defined(XP_MACOSX)
-#pragma options align=reset
-#endif
-#endif /* __LP64__ */
-
 /*----------------------------------------------------------------------*/
 /*       Error and Reason Code definitions                              */
 /*----------------------------------------------------------------------*/
diff --git a/dom/plugins/base/npfunctions.h b/dom/plugins/base/npfunctions.h
index 73097d115e..7638a64882 100644
--- a/dom/plugins/base/npfunctions.h
+++ b/dom/plugins/base/npfunctions.h
@@ -182,31 +182,6 @@ typedef struct _NPNetscapeFuncs {
   NPN_SetCurrentAsyncSurfacePtr setcurrentasyncsurface;
 } NPNetscapeFuncs;
 
-#ifdef XP_MACOSX
-/*
- * Mac OS X version(s) of NP_GetMIMEDescription(const char *)
- * These can be called to retreive MIME information from the plugin dynamically
- *
- * Note: For compatibility with Quicktime, BPSupportedMIMEtypes is another way
- *       to get mime info from the plugin only on OSX and may not be supported
- *       in furture version -- use NP_GetMIMEDescription instead
- */
-enum
-{
- kBPSupportedMIMETypesStructVers_1    = 1
-};
-typedef struct _BPSupportedMIMETypes
-{
- SInt32    structVersion;      /* struct version */
- Handle    typeStrings;        /* STR# formated handle, allocated by plug-in */
- Handle    infoStrings;        /* STR# formated handle, allocated by plug-in */
-} BPSupportedMIMETypes;
-OSErr BP_GetSupportedMIMETypes(BPSupportedMIMETypes *mimeInfo, UInt32 flags);
-#define NP_GETMIMEDESCRIPTION_NAME "NP_GetMIMEDescription"
-typedef const char* (*NP_GetMIMEDescriptionProcPtr)(void);
-typedef OSErr (*BP_GetSupportedMIMETypesProcPtr)(BPSupportedMIMETypes*, UInt32);
-#endif
-
 #if defined(_WIN32)
 #define OSCALL WINAPI
 #else
@@ -251,15 +226,8 @@ typedef char*          (*NP_GetPluginVersionFunc)(void);
 NP_EXPORT(char*)       NP_GetPluginVersion(void);
 typedef const char*    (*NP_GetMIMEDescriptionFunc)(void);
 NP_EXPORT(const char*) NP_GetMIMEDescription(void);
-#ifdef XP_MACOSX
-typedef NPError        (*NP_InitializeFunc)(NPNetscapeFuncs*);
-NP_EXPORT(NPError)     NP_Initialize(NPNetscapeFuncs* bFuncs);
-typedef NPError        (*NP_GetEntryPointsFunc)(NPPluginFuncs*);
-NP_EXPORT(NPError)     NP_GetEntryPoints(NPPluginFuncs* pFuncs);
-#else
 typedef NPError    (*NP_InitializeFunc)(NPNetscapeFuncs*, NPPluginFuncs*);
 NP_EXPORT(NPError) NP_Initialize(NPNetscapeFuncs* bFuncs, NPPluginFuncs* pFuncs);
-#endif
 typedef NPError        (*NP_ShutdownFunc)(void);
 NP_EXPORT(NPError)     NP_Shutdown(void);
 typedef NPError        (*NP_GetValueFunc)(void *, NPPVariable, void *);
diff --git a/dom/plugins/base/nsNPAPIPlugin.cpp b/dom/plugins/base/nsNPAPIPlugin.cpp
index da4f09914f..b2e931483f 100644
--- a/dom/plugins/base/nsNPAPIPlugin.cpp
+++ b/dom/plugins/base/nsNPAPIPlugin.cpp
@@ -269,14 +269,6 @@ nsNPAPIPlugin::CreatePlugin(nsPluginTag *aPluginTag, nsNPAPIPlugin** aResult)
     return NS_ERROR_FAILURE;
   }
 
-#ifdef XP_MACOSX
-  if (!pluginLib->HasRequiredFunctions()) {
-    NS_WARNING("Not all necessary functions exposed by plugin, it will not load.");
-    delete pluginLib;
-    return NS_ERROR_FAILURE;
-  }
-#endif
-
   plugin->mLibrary = pluginLib;
   pluginLib->SetPlugin(plugin);
 
@@ -294,19 +286,6 @@ nsNPAPIPlugin::CreatePlugin(nsPluginTag *aPluginTag, nsNPAPIPlugin** aResult)
   if (rv != NS_OK || pluginCallError != NPERR_NO_ERROR) {
     return NS_ERROR_FAILURE;
   }
-#elif defined(XP_MACOSX)
-  // NP_Initialize must be called before NP_GetEntryPoints on Mac OS X.
-  // We need to match WebKit's behavior.
-  NPError pluginCallError;
-  nsresult rv = pluginLib->NP_Initialize(&sBrowserFuncs, &pluginCallError);
-  if (rv != NS_OK || pluginCallError != NPERR_NO_ERROR) {
-    return NS_ERROR_FAILURE;
-  }
-
-  rv = pluginLib->NP_GetEntryPoints(&plugin->mPluginFuncs, &pluginCallError);
-  if (rv != NS_OK || pluginCallError != NPERR_NO_ERROR) {
-    return NS_ERROR_FAILURE;
-  }
 #else
   NPError pluginCallError;
   nsresult rv = pluginLib->NP_Initialize(&sBrowserFuncs, &plugin->mPluginFuncs, &pluginCallError);
@@ -1729,7 +1708,7 @@ _getvalue(NPP npp, NPNVariable variable, void *result)
   // cases for android_npapi.h's non-standard ANPInterface values.
   switch (static_cast<int>(variable)) {
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
   case NPNVxDisplay : {
 #if defined(MOZ_X11)
     if (npp) {
@@ -1854,8 +1833,7 @@ _getvalue(NPP npp, NPNVariable variable, void *result)
   }
 
   case NPNVSupportsWindowless: {
-#if defined(XP_WIN) || defined(XP_MACOSX) || \
-    (defined(MOZ_X11) && defined(MOZ_WIDGET_GTK))
+#if defined(XP_WIN) || (defined(MOZ_X11) && defined(MOZ_WIDGET_GTK))
     *(NPBool*)result = true;
 #else
     *(NPBool*)result = false;
@@ -1923,72 +1901,7 @@ _getvalue(NPP npp, NPNVariable variable, void *result)
     return *(char**)result ? NPERR_NO_ERROR : NPERR_GENERIC_ERROR;
   }
 
-#ifdef XP_MACOSX
-  case NPNVpluginDrawingModel: {
-    if (npp) {
-      nsNPAPIPluginInstance *inst = (nsNPAPIPluginInstance*)npp->ndata;
-      if (inst) {
-        NPDrawingModel drawingModel;
-        inst->GetDrawingModel((int32_t*)&drawingModel);
-        *(NPDrawingModel*)result = drawingModel;
-        return NPERR_NO_ERROR;
-      }
-    }
-    return NPERR_GENERIC_ERROR;
-  }
-
-#ifndef NP_NO_QUICKDRAW
-  case NPNVsupportsQuickDrawBool: {
-    *(NPBool*)result = false;
-
-    return NPERR_NO_ERROR;
-  }
-#endif
-
-  case NPNVsupportsCoreGraphicsBool: {
-    *(NPBool*)result = true;
-
-    return NPERR_NO_ERROR;
-  }
-
-  case NPNVsupportsCoreAnimationBool: {
-    *(NPBool*)result = true;
-
-    return NPERR_NO_ERROR;
-  }
-
-  case NPNVsupportsInvalidatingCoreAnimationBool: {
-    *(NPBool*)result = true;
-
-    return NPERR_NO_ERROR;
-  }
-
-  case NPNVsupportsCompositingCoreAnimationPluginsBool: {
-    *(NPBool*)result = PR_TRUE;
-
-    return NPERR_NO_ERROR;
-  }
-
-#ifndef NP_NO_CARBON
-  case NPNVsupportsCarbonBool: {
-    *(NPBool*)result = false;
-
-    return NPERR_NO_ERROR;
-  }
-#endif
-  case NPNVsupportsCocoaBool: {
-    *(NPBool*)result = true;
-
-    return NPERR_NO_ERROR;
-  }
-
-  case NPNVsupportsUpdatedCocoaTextInputBool: {
-    *(NPBool*)result = true;
-    return NPERR_NO_ERROR;
-  }
-#endif
-
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   case NPNVcontentsScaleFactor: {
     nsNPAPIPluginInstance *inst =
       (nsNPAPIPluginInstance *) (npp ? npp->ndata : nullptr);
@@ -2051,16 +1964,8 @@ _setvalue(NPP npp, NPPVariable variable, void *result)
     // actual pointer value is checked rather than its content
     // when passing booleans
     case NPPVpluginWindowBool: {
-#ifdef XP_MACOSX
-      // This setting doesn't apply to OS X (only to Windows and Unix/Linux).
-      // See https://developer.mozilla.org/En/NPN_SetValue#section_5.  Return
-      // NPERR_NO_ERROR here to conform to other browsers' behavior on OS X
-      // (e.g. Safari and Opera).
-      return NPERR_NO_ERROR;
-#else
       NPBool bWindowless = (result == nullptr);
       return inst->SetWindowless(bWindowless);
-#endif
     }
     case NPPVpluginTransparentBool: {
       NPBool bTransparent = (result != nullptr);
@@ -2145,18 +2050,6 @@ _setvalue(NPP npp, NPPVariable variable, void *result)
       }
     }
 
-#ifdef XP_MACOSX
-    case NPPVpluginEventModel: {
-      if (inst) {
-        inst->SetEventModel((NPEventModel)NS_PTR_TO_INT32(result));
-        return NPERR_NO_ERROR;
-      }
-      else {
-        return NPERR_GENERIC_ERROR;
-      }
-    }
-#endif
-
     default:
       return NPERR_GENERIC_ERROR;
   }
diff --git a/dom/plugins/base/nsNPAPIPlugin.h b/dom/plugins/base/nsNPAPIPlugin.h
index 96e630b629..7727bf77fb 100644
--- a/dom/plugins/base/nsNPAPIPlugin.h
+++ b/dom/plugins/base/nsNPAPIPlugin.h
@@ -45,10 +45,6 @@ public:
   // PluginFuncs() can't fail but results are only valid if GetLibrary() succeeds
   NPPluginFuncs* PluginFuncs();
 
-#if defined(XP_MACOSX) && !defined(__LP64__)
-  void SetPluginRefNum(short aRefNum);
-#endif
-
   // The IPC mechanism notifies the nsNPAPIPlugin if the plugin
   // crashes and is no longer usable. pluginDumpID/browserDumpID are
   // the IDs of respective minidumps that were written, or empty if no
diff --git a/dom/plugins/base/nsNPAPIPluginInstance.cpp b/dom/plugins/base/nsNPAPIPluginInstance.cpp
index 7ee71c8f72..203c61a5c8 100644
--- a/dom/plugins/base/nsNPAPIPluginInstance.cpp
+++ b/dom/plugins/base/nsNPAPIPluginInstance.cpp
@@ -60,9 +60,6 @@ nsNPAPIPluginInstance::nsNPAPIPluginInstance()
   , mPlugin(nullptr)
   , mMIMEType(nullptr)
   , mOwner(nullptr)
-#ifdef XP_MACOSX
-  , mCurrentPluginEvent(nullptr)
-#endif
   , mHaveJavaC2PJSObjectQuirk(false)
   , mCachedParamLength(0)
   , mCachedParamNames(nullptr)
@@ -503,9 +500,6 @@ nsresult nsNPAPIPluginInstance::HandleEvent(void* event, int16_t* result,
   int16_t tmpResult = kNPEventNotHandled;
 
   if (pluginFunctions->event) {
-#ifdef XP_MACOSX
-    mCurrentPluginEvent = event;
-#endif
 #if defined(XP_WIN)
     NS_TRY_SAFE_CALL_RETURN(tmpResult, (*pluginFunctions->event)(&mNPP, event), this,
                             aSafeToReenterGecko);
@@ -519,9 +513,6 @@ nsresult nsNPAPIPluginInstance::HandleEvent(void* event, int16_t* result,
 
     if (result)
       *result = tmpResult;
-#ifdef XP_MACOSX
-    mCurrentPluginEvent = nullptr;
-#endif
   }
 
   return NS_OK;
@@ -617,19 +608,6 @@ void nsNPAPIPluginInstance::RedrawPlugin()
   mOwner->RedrawPlugin();
 }
 
-#if defined(XP_MACOSX)
-void nsNPAPIPluginInstance::SetEventModel(NPEventModel aModel)
-{
-  // the event model needs to be set for the object frame immediately
-  if (!mOwner) {
-    NS_WARNING("Trying to set event model without a plugin instance owner!");
-    return;
-  }
-
-  mOwner->SetEventModel(aModel);
-}
-#endif
-
 nsresult nsNPAPIPluginInstance::GetDrawingModel(int32_t* aModel)
 {
   *aModel = (int32_t)mDrawingModel;
@@ -638,24 +616,14 @@ nsresult nsNPAPIPluginInstance::GetDrawingModel(int32_t* aModel)
 
 nsresult nsNPAPIPluginInstance::IsRemoteDrawingCoreAnimation(bool* aDrawing)
 {
-#ifdef XP_MACOSX
-  if (!mPlugin)
-      return NS_ERROR_FAILURE;
-
-  PluginLibrary* library = mPlugin->GetLibrary();
-  if (!library)
-      return NS_ERROR_FAILURE;
-
-  return library->IsRemoteDrawingCoreAnimation(&mNPP, aDrawing);
-#else
+  /** Mac Stub **/
   return NS_ERROR_FAILURE;
-#endif
 }
 
 nsresult
 nsNPAPIPluginInstance::ContentsScaleFactorChanged(double aContentsScaleFactor)
 {
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   if (!mPlugin)
       return NS_ERROR_FAILURE;
 
@@ -732,12 +700,7 @@ nsNPAPIPluginInstance::ShouldCache()
 nsresult
 nsNPAPIPluginInstance::IsWindowless(bool* isWindowless)
 {
-#ifdef XP_MACOSX
-  // All OS X plugins are windowless.
-  *isWindowless = true;
-#else
   *isWindowless = mWindowless;
-#endif
   return NS_OK;
 }
 
diff --git a/dom/plugins/base/nsNPAPIPluginInstance.h b/dom/plugins/base/nsNPAPIPluginInstance.h
index 48e62517de..c3272e0a87 100644
--- a/dom/plugins/base/nsNPAPIPluginInstance.h
+++ b/dom/plugins/base/nsNPAPIPluginInstance.h
@@ -34,12 +34,6 @@ class nsPluginInstanceOwner;
 const NPDrawingModel kDefaultDrawingModel = NPDrawingModelSyncWin;
 #elif defined(MOZ_X11)
 const NPDrawingModel kDefaultDrawingModel = NPDrawingModelSyncX;
-#elif defined(XP_MACOSX)
-#ifndef NP_NO_QUICKDRAW
-const NPDrawingModel kDefaultDrawingModel = NPDrawingModelQuickDraw; // Not supported
-#else
-const NPDrawingModel kDefaultDrawingModel = NPDrawingModelCoreGraphics;
-#endif
 #else
 const NPDrawingModel kDefaultDrawingModel = static_cast<NPDrawingModel>(0);
 #endif
@@ -146,13 +140,6 @@ public:
 
   void SetDrawingModel(NPDrawingModel aModel);
   void RedrawPlugin();
-#ifdef XP_MACOSX
-  void SetEventModel(NPEventModel aModel);
-
-  void* GetCurrentEvent() {
-    return mCurrentPluginEvent;
-  }
-#endif
 
   nsresult NewStreamListener(const char* aURL, void* notifyData,
                              nsNPAPIPluginStreamListener** listener);
@@ -291,11 +278,6 @@ private:
 
   nsTArray<nsNPAPITimer*> mTimers;
 
-#ifdef XP_MACOSX
-  // non-null during a HandleEvent call
-  void* mCurrentPluginEvent;
-#endif
-
   // Timestamp for the last time this plugin was stopped.
   // This is only valid when the plugin is actually stopped!
   mozilla::TimeStamp mStopTime;
diff --git a/dom/plugins/base/nsPluginHost.cpp b/dom/plugins/base/nsPluginHost.cpp
index 1b98855d1f..482a201f8f 100644
--- a/dom/plugins/base/nsPluginHost.cpp
+++ b/dom/plugins/base/nsPluginHost.cpp
@@ -33,9 +33,6 @@
 #include "nsProtocolProxyService.h"
 #include "nsIStreamConverterService.h"
 #include "nsIFile.h"
-#if defined(XP_MACOSX)
-#include "nsILocalFileMac.h"
-#endif
 #include "nsISeekableStream.h"
 #include "nsNetUtil.h"
 #include "nsIFileStreams.h"
@@ -1925,19 +1922,7 @@ int64_t GetPluginLastModifiedTime(const nsCOMPtr<nsIFile>& localfile)
 {
   PRTime fileModTime = 0;
 
-#if defined(XP_MACOSX)
-  // On OS X the date of a bundle's "contents" (i.e. of its Info.plist file)
-  // is a much better guide to when it was last modified than the date of
-  // its package directory.  See bug 313700.
-  nsCOMPtr<nsILocalFileMac> localFileMac = do_QueryInterface(localfile);
-  if (localFileMac) {
-    localFileMac->GetBundleContentsLastModifiedTime(&fileModTime);
-  } else {
-    localfile->GetLastModifiedTime(&fileModTime);
-  }
-#else
   localfile->GetLastModifiedTime(&fileModTime);
-#endif
 
   return fileModTime;
 }
diff --git a/dom/plugins/base/nsPluginInstanceOwner.cpp b/dom/plugins/base/nsPluginInstanceOwner.cpp
index 0d4dc68ccc..60a9bc0caa 100644
--- a/dom/plugins/base/nsPluginInstanceOwner.cpp
+++ b/dom/plugins/base/nsPluginInstanceOwner.cpp
@@ -77,12 +77,6 @@ static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
 #include "mozilla/widget/WinMessages.h"
 #endif // #ifdef XP_WIN
 
-#ifdef XP_MACOSX
-#include "ComplexTextInputPanel.h"
-#include "nsIDOMXULDocument.h"
-#include "nsIDOMXULCommandDispatcher.h"
-#endif
-
 #ifdef MOZ_WIDGET_GTK
 #include <gdk/gdk.h>
 #include <gtk/gtk.h>
@@ -229,27 +223,13 @@ nsPluginInstanceOwner::EndUpdateBackground(const nsIntRect& aRect)
 bool
 nsPluginInstanceOwner::UseAsyncRendering()
 {
-#ifdef XP_MACOSX
-  if (mUseAsyncRendering) {
-    return true;
-  }
-#endif
-
   bool isOOP;
   bool result = (mInstance &&
           NS_SUCCEEDED(mInstance->GetIsOOP(&isOOP)) && isOOP
-#ifndef XP_MACOSX
           && (!mPluginWindow ||
            mPluginWindow->type == NPWindowTypeDrawable)
-#endif
           );
 
-#ifdef XP_MACOSX
-  if (result) {
-    mUseAsyncRendering = true;
-  }
-#endif
-
   return result;
 }
 
@@ -275,13 +255,6 @@ nsPluginInstanceOwner::nsPluginInstanceOwner()
 
   mPluginFrame = nullptr;
   mWidgetCreationComplete = false;
-#ifdef XP_MACOSX
-  mSentInitialTopLevelWindowEvent = false;
-  mLastWindowIsActive = false;
-  mLastContentFocused = false;
-  mLastScaleFactor = 1.0;
-  mShouldBlurOnActivate = false;
-#endif
   mLastCSSZoomFactor = 1.0;
   mContentFocused = false;
   mWidgetVisible = true;
@@ -289,16 +262,6 @@ nsPluginInstanceOwner::nsPluginInstanceOwner()
   mPluginDocumentActiveState = true;
   mLastMouseDownButtonType = -1;
 
-#ifdef XP_MACOSX
-#ifndef NP_NO_CARBON
-  // We don't support Carbon, but it is still the default model for i386 NPAPI.
-  mEventModel = NPEventModelCarbon;
-#else
-  mEventModel = NPEventModelCocoa;
-#endif
-  mUseAsyncRendering = false;
-#endif
-
   mWaitingForPaint = false;
 
 #ifdef XP_WIN
@@ -531,15 +494,6 @@ NS_IMETHODIMP nsPluginInstanceOwner::InvalidateRect(NPRect *invalidRect)
   if (!mPluginFrame || !invalidRect || !mWidgetVisible)
     return NS_ERROR_FAILURE;
 
-#ifdef XP_MACOSX
-  // Each time an asynchronously-drawing plugin sends a new surface to display,
-  // the image in the ImageContainer is updated and InvalidateRect is called.
-  // There are different side effects for (sync) Android plugins.
-  RefPtr<ImageContainer> container;
-  mInstance->GetImageContainer(getter_AddRefs(container));
-#endif
-
-#ifndef XP_MACOSX
   // Silverlight calls invalidate for windowed plugins so this needs to work.
   if (mWidget) {
     mWidget->Invalidate(
@@ -553,7 +507,6 @@ NS_IMETHODIMP nsPluginInstanceOwner::InvalidateRect(NPRect *invalidRect)
       return NS_OK;
     }
   }
-#endif
 
   nsIntRect rect(invalidRect->left,
                  invalidRect->top,
@@ -964,252 +917,14 @@ nsPluginInstanceOwner::OnWindowedPluginKeyEvent(
 
 NS_IMETHODIMP nsPluginInstanceOwner::SetEventModel(int32_t eventModel)
 {
-#ifdef XP_MACOSX
-  mEventModel = static_cast<NPEventModel>(eventModel);
-  return NS_OK;
-#else
   return NS_ERROR_NOT_IMPLEMENTED;
-#endif
-}
-
-#ifdef XP_MACOSX
-NPBool nsPluginInstanceOwner::ConvertPointPuppet(PuppetWidget *widget,
-                                                 nsPluginFrame* pluginFrame,
-                                                 double sourceX, double sourceY,
-                                                 NPCoordinateSpace sourceSpace,
-                                                 double *destX, double *destY,
-                                                 NPCoordinateSpace destSpace)
-{
-  NS_ENSURE_TRUE(widget && widget->GetOwningTabChild() && pluginFrame, false);
-  // Caller has to want a result.
-  NS_ENSURE_TRUE(destX || destY, false);
-
-  if (sourceSpace == destSpace) {
-    if (destX) {
-      *destX = sourceX;
-    }
-    if (destY) {
-      *destY = sourceY;
-    }
-    return true;
-  }
-
-  nsPresContext* presContext = pluginFrame->PresContext();
-  double scaleFactor = double(nsPresContext::AppUnitsPerCSSPixel())/
-    presContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom();
-
-  PuppetWidget *puppetWidget = static_cast<PuppetWidget*>(widget);
-  PuppetWidget *rootWidget = static_cast<PuppetWidget*>(widget->GetTopLevelWidget());
-  if (!rootWidget) {
-    return false;
-  }
-  nsPoint chromeSize = AsNsPoint(rootWidget->GetChromeDimensions()) / scaleFactor;
-  nsIntSize intScreenDims = rootWidget->GetScreenDimensions();
-  nsSize screenDims = nsSize(intScreenDims.width / scaleFactor,
-                             intScreenDims.height / scaleFactor);
-  int32_t screenH = screenDims.height;
-  nsPoint windowPosition = AsNsPoint(rootWidget->GetWindowPosition()) / scaleFactor;
-
-  // Window size is tab size + chrome size.
-  LayoutDeviceIntRect tabContentBounds = puppetWidget->GetBounds();
-  tabContentBounds.ScaleInverseRoundOut(scaleFactor);
-  int32_t windowH = tabContentBounds.height + int(chromeSize.y);
-
-  nsPoint pluginPosition = AsNsPoint(pluginFrame->GetScreenRect().TopLeft());
-
-  // Convert (sourceX, sourceY) to 'real' (not PuppetWidget) screen space.
-  // In OSX, the Y-axis increases upward, which is the reverse of ours.
-  // We want OSX coordinates for window and screen so those equations are swapped.
-  nsPoint sourcePoint(sourceX, sourceY);
-  nsPoint screenPoint;
-  switch (sourceSpace) {
-    case NPCoordinateSpacePlugin:
-      screenPoint = sourcePoint + pluginPosition +
-        pluginFrame->GetContentRectRelativeToSelf().TopLeft() / nsPresContext::AppUnitsPerCSSPixel();
-      break;
-    case NPCoordinateSpaceWindow:
-      screenPoint = nsPoint(sourcePoint.x, windowH-sourcePoint.y) +
-        windowPosition;
-      break;
-    case NPCoordinateSpaceFlippedWindow:
-      screenPoint = sourcePoint + windowPosition;
-      break;
-    case NPCoordinateSpaceScreen:
-      screenPoint = nsPoint(sourcePoint.x, screenH-sourcePoint.y);
-      break;
-    case NPCoordinateSpaceFlippedScreen:
-      screenPoint = sourcePoint;
-      break;
-    default:
-      return false;
-  }
-
-  // Convert from screen to dest space.
-  nsPoint destPoint;
-  switch (destSpace) {
-    case NPCoordinateSpacePlugin:
-      destPoint = screenPoint - pluginPosition -
-        pluginFrame->GetContentRectRelativeToSelf().TopLeft() / nsPresContext::AppUnitsPerCSSPixel();
-      break;
-    case NPCoordinateSpaceWindow:
-      destPoint = screenPoint - windowPosition;
-      destPoint.y = windowH - destPoint.y;
-      break;
-    case NPCoordinateSpaceFlippedWindow:
-      destPoint = screenPoint - windowPosition;
-      break;
-    case NPCoordinateSpaceScreen:
-      destPoint = nsPoint(screenPoint.x, screenH-screenPoint.y);
-      break;
-    case NPCoordinateSpaceFlippedScreen:
-      destPoint = screenPoint;
-      break;
-    default:
-      return false;
-  }
-
-  if (destX) {
-    *destX = destPoint.x;
-  }
-  if (destY) {
-    *destY = destPoint.y;
-  }
-
-  return true;
 }
 
-NPBool nsPluginInstanceOwner::ConvertPointNoPuppet(nsIWidget *widget,
-                                                   nsPluginFrame* pluginFrame,
-                                                   double sourceX, double sourceY,
-                                                   NPCoordinateSpace sourceSpace,
-                                                   double *destX, double *destY,
-                                                   NPCoordinateSpace destSpace)
-{
-  NS_ENSURE_TRUE(widget && pluginFrame, false);
-  // Caller has to want a result.
-  NS_ENSURE_TRUE(destX || destY, false);
-
-  if (sourceSpace == destSpace) {
-    if (destX) {
-      *destX = sourceX;
-    }
-    if (destY) {
-      *destY = sourceY;
-    }
-    return true;
-  }
-
-  nsPresContext* presContext = pluginFrame->PresContext();
-  double scaleFactor = double(nsPresContext::AppUnitsPerCSSPixel())/
-    presContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom();
-
-  nsCOMPtr<nsIScreenManager> screenMgr = do_GetService("@mozilla.org/gfx/screenmanager;1");
-  if (!screenMgr) {
-    return false;
-  }
-  nsCOMPtr<nsIScreen> screen;
-  screenMgr->ScreenForNativeWidget(widget->GetNativeData(NS_NATIVE_WINDOW), getter_AddRefs(screen));
-  if (!screen) {
-    return false;
-  }
-
-  int32_t screenX, screenY, screenWidth, screenHeight;
-  screen->GetRect(&screenX, &screenY, &screenWidth, &screenHeight);
-  screenHeight /= scaleFactor;
-
-  LayoutDeviceIntRect windowScreenBounds = widget->GetScreenBounds();
-  windowScreenBounds.ScaleInverseRoundOut(scaleFactor);
-  int32_t windowX = windowScreenBounds.x;
-  int32_t windowY = windowScreenBounds.y;
-  int32_t windowHeight = windowScreenBounds.height;
-
-  nsIntRect pluginScreenRect = pluginFrame->GetScreenRect();
-
-  double screenXGecko, screenYGecko;
-  switch (sourceSpace) {
-    case NPCoordinateSpacePlugin:
-      screenXGecko = pluginScreenRect.x + sourceX;
-      screenYGecko = pluginScreenRect.y + sourceY;
-      break;
-    case NPCoordinateSpaceWindow:
-      screenXGecko = windowX + sourceX;
-      screenYGecko = windowY + (windowHeight - sourceY);
-      break;
-    case NPCoordinateSpaceFlippedWindow:
-      screenXGecko = windowX + sourceX;
-      screenYGecko = windowY + sourceY;
-      break;
-    case NPCoordinateSpaceScreen:
-      screenXGecko = sourceX;
-      screenYGecko = screenHeight - sourceY;
-      break;
-    case NPCoordinateSpaceFlippedScreen:
-      screenXGecko = sourceX;
-      screenYGecko = sourceY;
-      break;
-    default:
-      return false;
-  }
-
-  double destXCocoa, destYCocoa;
-  switch (destSpace) {
-    case NPCoordinateSpacePlugin:
-      destXCocoa = screenXGecko - pluginScreenRect.x;
-      destYCocoa = screenYGecko - pluginScreenRect.y;
-      break;
-    case NPCoordinateSpaceWindow:
-      destXCocoa = screenXGecko - windowX;
-      destYCocoa = windowHeight - (screenYGecko - windowY);
-      break;
-    case NPCoordinateSpaceFlippedWindow:
-      destXCocoa = screenXGecko - windowX;
-      destYCocoa = screenYGecko - windowY;
-      break;
-    case NPCoordinateSpaceScreen:
-      destXCocoa = screenXGecko;
-      destYCocoa = screenHeight - screenYGecko;
-      break;
-    case NPCoordinateSpaceFlippedScreen:
-      destXCocoa = screenXGecko;
-      destYCocoa = screenYGecko;
-      break;
-    default:
-      return false;
-  }
-
-  if (destX) {
-    *destX = destXCocoa;
-  }
-  if (destY) {
-    *destY = destYCocoa;
-  }
-
-  return true;
-}
-#endif // XP_MACOSX
-
 NPBool nsPluginInstanceOwner::ConvertPoint(double sourceX, double sourceY, NPCoordinateSpace sourceSpace,
                                            double *destX, double *destY, NPCoordinateSpace destSpace)
 {
-#ifdef XP_MACOSX
-  if (!mPluginFrame) {
-    return false;
-  }
-
-  MOZ_ASSERT(mPluginFrame->GetNearestWidget());
-
-  if (nsIWidget::UsePuppetWidgets()) {
-    return ConvertPointPuppet(static_cast<PuppetWidget*>(mPluginFrame->GetNearestWidget()),
-                               mPluginFrame, sourceX, sourceY, sourceSpace,
-                               destX, destY, destSpace);
-  }
-
-  return ConvertPointNoPuppet(mPluginFrame->GetNearestWidget(),
-                              mPluginFrame, sourceX, sourceY, sourceSpace,
-                              destX, destY, destSpace);
-#else
+  /** Mac Stub **/
   return false;
-#endif
 }
 
 NPError nsPluginInstanceOwner::InitAsyncSurface(NPSize *size, NPImageFormat format,
@@ -1253,133 +968,7 @@ void nsPluginInstanceOwner::GetParameters(nsTArray<MozPluginParameter>& paramete
   loadingContent->GetPluginParameters(parameters);
 }
 
-#ifdef XP_MACOSX
-
-static void InitializeNPCocoaEvent(NPCocoaEvent* event)
-{
-  memset(event, 0, sizeof(NPCocoaEvent));
-}
-
-NPDrawingModel nsPluginInstanceOwner::GetDrawingModel()
-{
-#ifndef NP_NO_QUICKDRAW
-  // We don't support the Quickdraw drawing model any more but it's still
-  // the default model for i386 per NPAPI.
-  NPDrawingModel drawingModel = NPDrawingModelQuickDraw;
-#else
-  NPDrawingModel drawingModel = NPDrawingModelCoreGraphics;
-#endif
-
-  if (!mInstance)
-    return drawingModel;
-
-  mInstance->GetDrawingModel((int32_t*)&drawingModel);
-  return drawingModel;
-}
-
-bool nsPluginInstanceOwner::IsRemoteDrawingCoreAnimation()
-{
-  if (!mInstance)
-    return false;
-
-  bool coreAnimation;
-  if (!NS_SUCCEEDED(mInstance->IsRemoteDrawingCoreAnimation(&coreAnimation)))
-    return false;
-
-  return coreAnimation;
-}
-
-NPEventModel nsPluginInstanceOwner::GetEventModel()
-{
-  return mEventModel;
-}
-
-#define DEFAULT_REFRESH_RATE 20 // 50 FPS
-
-nsCOMPtr<nsITimer>               *nsPluginInstanceOwner::sCATimer = nullptr;
-nsTArray<nsPluginInstanceOwner*> *nsPluginInstanceOwner::sCARefreshListeners = nullptr;
-
-void nsPluginInstanceOwner::CARefresh(nsITimer *aTimer, void *aClosure) {
-  if (!sCARefreshListeners) {
-    return;
-  }
-  for (size_t i = 0; i < sCARefreshListeners->Length(); i++) {
-    nsPluginInstanceOwner* instanceOwner = (*sCARefreshListeners)[i];
-    NPWindow *window;
-    instanceOwner->GetWindow(window);
-    if (!window) {
-      continue;
-    }
-    NPRect r;
-    r.left = 0;
-    r.top = 0;
-    r.right = window->width;
-    r.bottom = window->height;
-    instanceOwner->InvalidateRect(&r);
-  }
-}
-
-void nsPluginInstanceOwner::AddToCARefreshTimer() {
-  if (!mInstance) {
-    return;
-  }
-
-  // Flash invokes InvalidateRect for us.
-  const char* mime = nullptr;
-  if (NS_SUCCEEDED(mInstance->GetMIMEType(&mime)) && mime &&
-      nsPluginHost::GetSpecialType(nsDependentCString(mime)) ==
-      nsPluginHost::eSpecialType_Flash) {
-    return;
-  }
-
-  if (!sCARefreshListeners) {
-    sCARefreshListeners = new nsTArray<nsPluginInstanceOwner*>();
-  }
-
-  if (sCARefreshListeners->Contains(this)) {
-    return;
-  }
-
-  sCARefreshListeners->AppendElement(this);
-
-  if (!sCATimer) {
-    sCATimer = new nsCOMPtr<nsITimer>();
-  }
-
-  if (sCARefreshListeners->Length() == 1) {
-    *sCATimer = do_CreateInstance("@mozilla.org/timer;1");
-    (*sCATimer)->InitWithFuncCallback(CARefresh, nullptr,
-                   DEFAULT_REFRESH_RATE, nsITimer::TYPE_REPEATING_SLACK);
-  }
-}
-
-void nsPluginInstanceOwner::RemoveFromCARefreshTimer() {
-  if (!sCARefreshListeners || sCARefreshListeners->Contains(this) == false) {
-    return;
-  }
-
-  sCARefreshListeners->RemoveElement(this);
-
-  if (sCARefreshListeners->Length() == 0) {
-    if (sCATimer) {
-      (*sCATimer)->Cancel();
-      delete sCATimer;
-      sCATimer = nullptr;
-    }
-    delete sCARefreshListeners;
-    sCARefreshListeners = nullptr;
-  }
-}
-
-void nsPluginInstanceOwner::SetPluginPort()
-{
-  void* pluginPort = GetPluginPort();
-  if (!pluginPort || !mPluginWindow)
-    return;
-  mPluginWindow->window = pluginPort;
-}
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
 nsresult nsPluginInstanceOwner::ContentsScaleFactorChanged(double aContentsScaleFactor)
 {
   if (!mInstance) {
@@ -1398,11 +987,6 @@ nsPluginInstanceOwner::GetEventloopNestingLevel()
   uint32_t currentLevel = 0;
   if (appShell) {
     appShell->GetEventloopNestingLevel(&currentLevel);
-#ifdef XP_MACOSX
-    // Cocoa widget code doesn't process UI events through the normal
-    // appshell event loop, so it needs an additional count here.
-    currentLevel++;
-#endif
   }
 
   // No idea how this happens... but Linux doesn't consistently
@@ -1427,15 +1011,11 @@ void
 nsPluginInstanceOwner::NotifyHostCreateWidget()
 {
   mPluginHost->CreateWidget(this);
-#ifdef XP_MACOSX
-  FixUpPluginWindow(ePluginPaintEnable);
-#else
   if (mPluginFrame) {
     mPluginFrame->InvalidateFrame();
   } else {
     CallSetWindow();
   }
-#endif
 }
 
 void
@@ -1457,12 +1037,10 @@ nsPluginInstanceOwner::NotifyDestroyPending()
 
 nsresult nsPluginInstanceOwner::DispatchFocusToPlugin(nsIDOMEvent* aFocusEvent)
 {
-#ifndef XP_MACOSX
   if (!mPluginWindow || (mPluginWindow->type == NPWindowTypeWindow)) {
     // continue only for cases without child window
     return aFocusEvent->PreventDefault(); // consume event
   }
-#endif
 
   WidgetEvent* theEvent = aFocusEvent->WidgetEventPtr();
   if (theEvent) {
@@ -1480,9 +1058,6 @@ nsresult nsPluginInstanceOwner::DispatchFocusToPlugin(nsIDOMEvent* aFocusEvent)
 
 nsresult nsPluginInstanceOwner::ProcessKeyPress(nsIDOMEvent* aKeyEvent)
 {
-#ifdef XP_MACOSX
-  return DispatchKeyToPlugin(aKeyEvent);
-#else
   if (SendNativeEvents())
     DispatchKeyToPlugin(aKeyEvent);
 
@@ -1493,16 +1068,13 @@ nsresult nsPluginInstanceOwner::ProcessKeyPress(nsIDOMEvent* aKeyEvent)
     aKeyEvent->StopPropagation();
   }
   return NS_OK;
-#endif
 }
 
 nsresult nsPluginInstanceOwner::DispatchKeyToPlugin(nsIDOMEvent* aKeyEvent)
 {
-#if !defined(XP_MACOSX)
   if (!mPluginWindow || (mPluginWindow->type == NPWindowTypeWindow))
     return aKeyEvent->PreventDefault(); // consume event
   // continue only for cases without child window
-#endif
 
   if (mInstance) {
     WidgetKeyboardEvent* keyEvent =
@@ -1522,11 +1094,9 @@ nsresult nsPluginInstanceOwner::DispatchKeyToPlugin(nsIDOMEvent* aKeyEvent)
 nsresult
 nsPluginInstanceOwner::ProcessMouseDown(nsIDOMEvent* aMouseEvent)
 {
-#if !defined(XP_MACOSX)
   if (!mPluginWindow || (mPluginWindow->type == NPWindowTypeWindow))
     return aMouseEvent->PreventDefault(); // consume event
   // continue only for cases without child window
-#endif
 
   // if the plugin is windowless, we need to set focus ourselves
   // otherwise, we might not get key events
@@ -1556,11 +1126,9 @@ nsPluginInstanceOwner::ProcessMouseDown(nsIDOMEvent* aMouseEvent)
 nsresult nsPluginInstanceOwner::DispatchMouseToPlugin(nsIDOMEvent* aMouseEvent,
                                                       bool aAllowPropagate)
 {
-#if !defined(XP_MACOSX)
   if (!mPluginWindow || (mPluginWindow->type == NPWindowTypeWindow))
     return aMouseEvent->PreventDefault(); // consume event
   // continue only for cases without child window
-#endif
   // don't send mouse events if we are hidden
   if (!mWidgetVisible)
     return NS_OK;
@@ -1770,22 +1338,6 @@ nsPluginInstanceOwner::HandleEvent(nsIDOMEvent* aEvent)
   nsAutoString eventType;
   aEvent->GetType(eventType);
 
-#ifdef XP_MACOSX
-  if (eventType.EqualsLiteral("activate") ||
-      eventType.EqualsLiteral("deactivate")) {
-    WindowFocusMayHaveChanged();
-    return NS_OK;
-  }
-  if (eventType.EqualsLiteral("MozPerformDelayedBlur")) {
-    if (mShouldBlurOnActivate) {
-      WidgetGUIEvent blurEvent(true, eBlur, nullptr);
-      ProcessEvent(blurEvent);
-      mShouldBlurOnActivate = false;
-    }
-    return NS_OK;
-  }
-#endif
-
   if (eventType.EqualsLiteral("focus")) {
     mContentFocused = true;
     return DispatchFocusToPlugin(aEvent);
@@ -1848,191 +1400,6 @@ static unsigned int XInputEventState(const WidgetInputEvent& anEvent)
 }
 #endif
 
-#ifdef XP_MACOSX
-
-// Returns whether or not content is the content that is or would be
-// focused if the top-level chrome window was active.
-static bool
-ContentIsFocusedWithinWindow(nsIContent* aContent)
-{
-  nsPIDOMWindowOuter* outerWindow = aContent->OwnerDoc()->GetWindow();
-  if (!outerWindow) {
-    return false;
-  }
-
-  nsPIDOMWindowOuter* rootWindow = outerWindow->GetPrivateRoot();
-  if (!rootWindow) {
-    return false;
-  }
-
-  nsFocusManager* fm = nsFocusManager::GetFocusManager();
-  if (!fm) {
-    return false;
-  }
-
-  nsCOMPtr<nsPIDOMWindowOuter> focusedFrame;
-  nsCOMPtr<nsIContent> focusedContent = fm->GetFocusedDescendant(rootWindow, true, getter_AddRefs(focusedFrame));
-  return (focusedContent.get() == aContent);
-}
-
-static NPCocoaEventType
-CocoaEventTypeForEvent(const WidgetGUIEvent& anEvent, nsIFrame* aObjectFrame)
-{
-  const NPCocoaEvent* event = static_cast<const NPCocoaEvent*>(anEvent.mPluginEvent);
-  if (event) {
-    return event->type;
-  }
-
-  switch (anEvent.mMessage) {
-    case eMouseOver:
-      return NPCocoaEventMouseEntered;
-    case eMouseOut:
-      return NPCocoaEventMouseExited;
-    case eMouseMove: {
-      // We don't know via information on events from the widget code whether or not
-      // we're dragging. The widget code just generates mouse move events from native
-      // drag events. If anybody is capturing, this is a drag event.
-      if (nsIPresShell::GetCapturingContent()) {
-        return NPCocoaEventMouseDragged;
-      }
-
-      return NPCocoaEventMouseMoved;
-    }
-    case eMouseDown:
-      return NPCocoaEventMouseDown;
-    case eMouseUp:
-      return NPCocoaEventMouseUp;
-    case eKeyDown:
-      return NPCocoaEventKeyDown;
-    case eKeyUp:
-      return NPCocoaEventKeyUp;
-    case eFocus:
-    case eBlur:
-      return NPCocoaEventFocusChanged;
-    case eLegacyMouseLineOrPageScroll:
-      return NPCocoaEventScrollWheel;
-    default:
-      return (NPCocoaEventType)0;
-  }
-}
-
-static NPCocoaEvent
-TranslateToNPCocoaEvent(WidgetGUIEvent* anEvent, nsIFrame* aObjectFrame)
-{
-  NPCocoaEvent cocoaEvent;
-  InitializeNPCocoaEvent(&cocoaEvent);
-  cocoaEvent.type = CocoaEventTypeForEvent(*anEvent, aObjectFrame);
-
-  if (anEvent->mMessage == eMouseMove ||
-      anEvent->mMessage == eMouseDown ||
-      anEvent->mMessage == eMouseUp ||
-      anEvent->mMessage == eLegacyMouseLineOrPageScroll ||
-      anEvent->mMessage == eMouseOver ||
-      anEvent->mMessage == eMouseOut)
-  {
-    nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(anEvent, aObjectFrame) -
-                 aObjectFrame->GetContentRectRelativeToSelf().TopLeft();
-    nsPresContext* presContext = aObjectFrame->PresContext();
-    // Plugin event coordinates need to be translated from device pixels
-    // into "display pixels" in HiDPI modes.
-    double scaleFactor = double(nsPresContext::AppUnitsPerCSSPixel())/
-      aObjectFrame->PresContext()->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom();
-    size_t intScaleFactor = ceil(scaleFactor);
-    nsIntPoint ptPx(presContext->AppUnitsToDevPixels(pt.x) / intScaleFactor,
-                    presContext->AppUnitsToDevPixels(pt.y) / intScaleFactor);
-    cocoaEvent.data.mouse.pluginX = double(ptPx.x);
-    cocoaEvent.data.mouse.pluginY = double(ptPx.y);
-  }
-
-  switch (anEvent->mMessage) {
-    case eMouseDown:
-    case eMouseUp: {
-      WidgetMouseEvent* mouseEvent = anEvent->AsMouseEvent();
-      if (mouseEvent) {
-        switch (mouseEvent->button) {
-          case WidgetMouseEvent::eLeftButton:
-            cocoaEvent.data.mouse.buttonNumber = 0;
-            break;
-          case WidgetMouseEvent::eRightButton:
-            cocoaEvent.data.mouse.buttonNumber = 1;
-            break;
-          case WidgetMouseEvent::eMiddleButton:
-            cocoaEvent.data.mouse.buttonNumber = 2;
-            break;
-          default:
-            NS_WARNING("Mouse button we don't know about?");
-        }
-        cocoaEvent.data.mouse.clickCount = mouseEvent->mClickCount;
-      } else {
-        NS_WARNING("eMouseUp/DOWN is not a WidgetMouseEvent?");
-      }
-      break;
-    }
-    case eLegacyMouseLineOrPageScroll: {
-      WidgetWheelEvent* wheelEvent = anEvent->AsWheelEvent();
-      if (wheelEvent) {
-        cocoaEvent.data.mouse.deltaX = wheelEvent->mLineOrPageDeltaX;
-        cocoaEvent.data.mouse.deltaY = wheelEvent->mLineOrPageDeltaY;
-      } else {
-        NS_WARNING("eLegacyMouseLineOrPageScroll is not a WidgetWheelEvent? "
-                   "(could be, haven't checked)");
-      }
-      break;
-    }
-    case eKeyDown:
-    case eKeyUp:
-    {
-      WidgetKeyboardEvent* keyEvent = anEvent->AsKeyboardEvent();
-
-      // That keyEvent->mPluginTextEventString is non-empty is a signal that we should
-      // create a text event for the plugin, instead of a key event.
-      if (anEvent->mMessage == eKeyDown &&
-          !keyEvent->mPluginTextEventString.IsEmpty()) {
-        cocoaEvent.type = NPCocoaEventTextInput;
-        const char16_t* pluginTextEventString = keyEvent->mPluginTextEventString.get();
-        cocoaEvent.data.text.text = (NPNSString*)
-          ::CFStringCreateWithCharacters(NULL,
-                                         reinterpret_cast<const UniChar*>(pluginTextEventString),
-                                         keyEvent->mPluginTextEventString.Length());
-      } else {
-        cocoaEvent.data.key.keyCode = keyEvent->mNativeKeyCode;
-        cocoaEvent.data.key.isARepeat = keyEvent->mIsRepeat;
-        cocoaEvent.data.key.modifierFlags = keyEvent->mNativeModifierFlags;
-        const char16_t* nativeChars = keyEvent->mNativeCharacters.get();
-        cocoaEvent.data.key.characters = (NPNSString*)
-          ::CFStringCreateWithCharacters(NULL,
-                                         reinterpret_cast<const UniChar*>(nativeChars),
-                                         keyEvent->mNativeCharacters.Length());
-        const char16_t* nativeCharsIgnoringModifiers = keyEvent->mNativeCharactersIgnoringModifiers.get();
-        cocoaEvent.data.key.charactersIgnoringModifiers = (NPNSString*)
-          ::CFStringCreateWithCharacters(NULL,
-                                         reinterpret_cast<const UniChar*>(nativeCharsIgnoringModifiers),
-                                         keyEvent->mNativeCharactersIgnoringModifiers.Length());
-      }
-      break;
-    }
-    case eFocus:
-    case eBlur:
-      cocoaEvent.data.focus.hasFocus = (anEvent->mMessage == eFocus);
-      break;
-    default:
-      break;
-  }
-  return cocoaEvent;
-}
-
-void nsPluginInstanceOwner::PerformDelayedBlurs()
-{
-  nsCOMPtr<nsIContent> content = do_QueryReferent(mContent);
-  nsCOMPtr<EventTarget> windowRoot = content->OwnerDoc()->GetWindow()->GetTopWindowRoot();
-  nsContentUtils::DispatchTrustedEvent(content->OwnerDoc(),
-                                       windowRoot,
-                                       NS_LITERAL_STRING("MozPerformDelayedBlur"),
-                                       false, false, nullptr);
-}
-
-#endif
-
 nsEventStatus nsPluginInstanceOwner::ProcessEvent(const WidgetGUIEvent& anEvent)
 {
   nsEventStatus rv = nsEventStatus_eIgnore;
@@ -2041,85 +1408,6 @@ nsEventStatus nsPluginInstanceOwner::ProcessEvent(const WidgetGUIEvent& anEvent)
     return nsEventStatus_eIgnore;
   }
 
-#ifdef XP_MACOSX
-  NPEventModel eventModel = GetEventModel();
-  if (eventModel != NPEventModelCocoa) {
-    return nsEventStatus_eIgnore;
-  }
-
-  // In the Cocoa event model, focus is per-window. Don't tell a plugin it lost
-  // focus unless it lost focus within the window. For example, ignore a blur
-  // event if it's coming due to the plugin's window deactivating.
-  nsCOMPtr<nsIContent> content = do_QueryReferent(mContent);
-  if (anEvent.mMessage == eBlur && ContentIsFocusedWithinWindow(content)) {
-    mShouldBlurOnActivate = true;
-    return nsEventStatus_eIgnore;
-  }
-
-  // Also, don't tell the plugin it gained focus again after we've already given
-  // it focus. This might happen if it has focus, its window is blurred, then the
-  // window is made active again. The plugin never lost in-window focus, so it
-  // shouldn't get a focus event again.
-  if (anEvent.mMessage == eFocus && mLastContentFocused == true) {
-    mShouldBlurOnActivate = false;
-    return nsEventStatus_eIgnore;
-  }
-
-  // Now, if we're going to send a focus event, update mLastContentFocused and
-  // tell any plugins in our window that we have taken focus, so they should
-  // perform any delayed blurs.
-  if (anEvent.mMessage == eFocus || anEvent.mMessage == eBlur) {
-    mLastContentFocused = (anEvent.mMessage == eFocus);
-    mShouldBlurOnActivate = false;
-    PerformDelayedBlurs();
-  }
-
-  NPCocoaEvent cocoaEvent = TranslateToNPCocoaEvent(const_cast<WidgetGUIEvent*>(&anEvent), mPluginFrame);
-  if (cocoaEvent.type == (NPCocoaEventType)0) {
-    return nsEventStatus_eIgnore;
-  }
-
-  if (cocoaEvent.type == NPCocoaEventTextInput) {
-    mInstance->HandleEvent(&cocoaEvent, nullptr);
-    return nsEventStatus_eConsumeNoDefault;
-  }
-
-  int16_t response = kNPEventNotHandled;
-  mInstance->HandleEvent(&cocoaEvent,
-                         &response,
-                         NS_PLUGIN_CALL_SAFE_TO_REENTER_GECKO);
-  if ((response == kNPEventStartIME) && (cocoaEvent.type == NPCocoaEventKeyDown)) {
-    nsIWidget* widget = mPluginFrame->GetNearestWidget();
-    if (widget) {
-      const WidgetKeyboardEvent* keyEvent = anEvent.AsKeyboardEvent();
-      double screenX, screenY;
-      ConvertPoint(0.0, mPluginFrame->GetScreenRect().height,
-                   NPCoordinateSpacePlugin, &screenX, &screenY,
-                   NPCoordinateSpaceScreen);
-      nsAutoString outText;
-      if (NS_SUCCEEDED(widget->StartPluginIME(*keyEvent, screenX, screenY, outText)) &&
-          !outText.IsEmpty()) {
-        CFStringRef cfString =
-          ::CFStringCreateWithCharacters(kCFAllocatorDefault,
-                                         reinterpret_cast<const UniChar*>(outText.get()),
-                                         outText.Length());
-        NPCocoaEvent textEvent;
-        InitializeNPCocoaEvent(&textEvent);
-        textEvent.type = NPCocoaEventTextInput;
-        textEvent.data.text.text = (NPNSString*)cfString;
-        mInstance->HandleEvent(&textEvent, nullptr);
-      }
-    }
-  }
-
-  bool handled = (response == kNPEventHandled || response == kNPEventStartIME);
-  bool leftMouseButtonDown = (anEvent.mMessage == eMouseDown) &&
-                             (anEvent.AsMouseEvent()->button == WidgetMouseEvent::eLeftButton);
-  if (handled && !(leftMouseButtonDown && !mContentFocused)) {
-    rv = nsEventStatus_eConsumeNoDefault;
-  }
-#endif
-
 #ifdef XP_WIN
   // this code supports windowless plugins
   const NPEvent *pPluginEvent = static_cast<const NPEvent*>(anEvent.mPluginEvent);
@@ -2525,10 +1813,6 @@ nsPluginInstanceOwner::Destroy()
 {
   SetFrame(nullptr);
 
-#ifdef XP_MACOSX
-  RemoveFromCARefreshTimer();
-#endif
-
   nsCOMPtr<nsIContent> content = do_QueryReferent(mContent);
 
   // unregister context menu listener
@@ -2580,44 +1864,6 @@ nsPluginInstanceOwner::Destroy()
 
 // Paints are handled differently, so we just simulate an update event.
 
-#ifdef XP_MACOSX
-void nsPluginInstanceOwner::Paint(const gfxRect& aDirtyRect, CGContextRef cgContext)
-{
-  if (!mInstance || !mPluginFrame)
-    return;
-
-  gfxRect dirtyRectCopy = aDirtyRect;
-  double scaleFactor = 1.0;
-  GetContentsScaleFactor(&scaleFactor);
-  if (scaleFactor != 1.0) {
-    ::CGContextScaleCTM(cgContext, scaleFactor, scaleFactor);
-    // Convert aDirtyRect from device pixels to "display pixels"
-    // for HiDPI modes
-    dirtyRectCopy.ScaleRoundOut(1.0 / scaleFactor);
-  }
-
-  DoCocoaEventDrawRect(dirtyRectCopy, cgContext);
-}
-
-void nsPluginInstanceOwner::DoCocoaEventDrawRect(const gfxRect& aDrawRect, CGContextRef cgContext)
-{
-  if (!mInstance || !mPluginFrame)
-    return;
-
-  // The context given here is only valid during the HandleEvent call.
-  NPCocoaEvent updateEvent;
-  InitializeNPCocoaEvent(&updateEvent);
-  updateEvent.type = NPCocoaEventDrawRect;
-  updateEvent.data.draw.context = cgContext;
-  updateEvent.data.draw.x = aDrawRect.X();
-  updateEvent.data.draw.y = aDrawRect.Y();
-  updateEvent.data.draw.width = aDrawRect.Width();
-  updateEvent.data.draw.height = aDrawRect.Height();
-
-  mInstance->HandleEvent(&updateEvent, nullptr);
-}
-#endif
-
 #ifdef XP_WIN
 void nsPluginInstanceOwner::Paint(const RECT& aDirty, HDC aDC)
 {
@@ -2934,7 +2180,6 @@ NS_IMETHODIMP nsPluginInstanceOwner::CreateWidget(void)
     if (content) {
       doc = content->OwnerDoc();
       parentWidget = nsContentUtils::WidgetForDocument(doc);
-#ifndef XP_MACOSX
       // If we're running in the content process, we need a remote widget created in chrome.
       if (XRE_IsContentProcess()) {
         if (nsCOMPtr<nsPIDOMWindowOuter> window = doc->GetWindow()) {
@@ -2950,16 +2195,13 @@ NS_IMETHODIMP nsPluginInstanceOwner::CreateWidget(void)
           }
         }
       }
-#endif // XP_MACOSX
     }
 
-#ifndef XP_MACOSX
     // A failure here is terminal since we can't fall back on the non-e10s code
     // path below.
     if (!mWidget && XRE_IsContentProcess()) {
       return NS_ERROR_UNEXPECTED;
     }
-#endif // XP_MACOSX
 
     if (!mWidget) {
       // native (single process)
@@ -3022,136 +2264,11 @@ NS_IMETHODIMP nsPluginInstanceOwner::CreateWidget(void)
     }
   }
 
-#ifdef XP_MACOSX
-  if (GetDrawingModel() == NPDrawingModelCoreAnimation) {
-    AddToCARefreshTimer();
-  }
-#endif
-
   mWidgetCreationComplete = true;
 
   return NS_OK;
 }
 
-// Mac specific code to fix up the port location and clipping region
-#ifdef XP_MACOSX
-
-void nsPluginInstanceOwner::FixUpPluginWindow(int32_t inPaintState)
-{
-  if (!mPluginWindow || !mInstance || !mPluginFrame) {
-    return;
-  }
-
-  SetPluginPort();
-
-  LayoutDeviceIntSize widgetClip = mPluginFrame->GetWidgetlessClipRect().Size();
-
-  mPluginWindow->x = 0;
-  mPluginWindow->y = 0;
-
-  NPRect oldClipRect = mPluginWindow->clipRect;
-
-  // fix up the clipping region
-  mPluginWindow->clipRect.top  = 0;
-  mPluginWindow->clipRect.left = 0;
-
-  if (inPaintState == ePluginPaintDisable) {
-    mPluginWindow->clipRect.bottom = mPluginWindow->clipRect.top;
-    mPluginWindow->clipRect.right  = mPluginWindow->clipRect.left;
-  }
-  else if (inPaintState == ePluginPaintEnable)
-  {
-    mPluginWindow->clipRect.bottom = mPluginWindow->clipRect.top + widgetClip.height;
-    mPluginWindow->clipRect.right  = mPluginWindow->clipRect.left + widgetClip.width;
-  }
-
-  // if the clip rect changed, call SetWindow()
-  // (RealPlayer needs this to draw correctly)
-  if (mPluginWindow->clipRect.left    != oldClipRect.left   ||
-      mPluginWindow->clipRect.top     != oldClipRect.top    ||
-      mPluginWindow->clipRect.right   != oldClipRect.right  ||
-      mPluginWindow->clipRect.bottom  != oldClipRect.bottom)
-  {
-    if (UseAsyncRendering()) {
-      mInstance->AsyncSetWindow(mPluginWindow);
-    }
-    else {
-      mPluginWindow->CallSetWindow(mInstance);
-    }
-  }
-
-  // After the first NPP_SetWindow call we need to send an initial
-  // top-level window focus event.
-  if (!mSentInitialTopLevelWindowEvent) {
-    // Set this before calling ProcessEvent to avoid endless recursion.
-    mSentInitialTopLevelWindowEvent = true;
-
-    bool isActive = WindowIsActive();
-    SendWindowFocusChanged(isActive);
-    mLastWindowIsActive = isActive;
-  }
-}
-
-void
-nsPluginInstanceOwner::WindowFocusMayHaveChanged()
-{
-  if (!mSentInitialTopLevelWindowEvent) {
-    return;
-  }
-
-  bool isActive = WindowIsActive();
-  if (isActive != mLastWindowIsActive) {
-    SendWindowFocusChanged(isActive);
-    mLastWindowIsActive = isActive;
-  }
-}
-
-bool
-nsPluginInstanceOwner::WindowIsActive()
-{
-  if (!mPluginFrame) {
-    return false;
-  }
-
-  EventStates docState = mPluginFrame->GetContent()->OwnerDoc()->GetDocumentState();
-  return !docState.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE);
-}
-
-void
-nsPluginInstanceOwner::SendWindowFocusChanged(bool aIsActive)
-{
-  if (!mInstance) {
-    return;
-  }
-
-  NPCocoaEvent cocoaEvent;
-  InitializeNPCocoaEvent(&cocoaEvent);
-  cocoaEvent.type = NPCocoaEventWindowFocusChanged;
-  cocoaEvent.data.focus.hasFocus = aIsActive;
-  mInstance->HandleEvent(&cocoaEvent,
-                         nullptr,
-                         NS_PLUGIN_CALL_SAFE_TO_REENTER_GECKO);
-}
-
-void
-nsPluginInstanceOwner::HidePluginWindow()
-{
-  if (!mPluginWindow || !mInstance) {
-    return;
-  }
-
-  mPluginWindow->clipRect.bottom = mPluginWindow->clipRect.top;
-  mPluginWindow->clipRect.right  = mPluginWindow->clipRect.left;
-  mWidgetVisible = false;
-  if (UseAsyncRendering()) {
-    mInstance->AsyncSetWindow(mPluginWindow);
-  } else {
-    mInstance->SetWindow(mPluginWindow);
-  }
-}
-
-#else // XP_MACOSX
-
 void nsPluginInstanceOwner::UpdateWindowPositionAndClipRect(bool aSetWindow)
 {
   if (!mPluginWindow)
@@ -3201,12 +2318,11 @@ nsPluginInstanceOwner::UpdateWindowVisibility(bool aVisible)
   mPluginWindowVisible = aVisible;
   UpdateWindowPositionAndClipRect(true);
 }
-#endif // XP_MACOSX
 
 void
 nsPluginInstanceOwner::ResolutionMayHaveChanged()
 {
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   double scaleFactor = 1.0;
   GetContentsScaleFactor(&scaleFactor);
   if (scaleFactor != mLastScaleFactor) {
@@ -3231,7 +2347,6 @@ nsPluginInstanceOwner::UpdateDocumentActiveState(bool aIsActive)
   PROFILER_LABEL_FUNC(js::ProfileEntry::Category::OTHER);
 
   mPluginDocumentActiveState = aIsActive;
-#ifndef XP_MACOSX
   UpdateWindowPositionAndClipRect(true);
 
   // We don't have a connection to PluginWidgetParent in the chrome
@@ -3243,7 +2358,6 @@ nsPluginInstanceOwner::UpdateDocumentActiveState(bool aIsActive)
     mWidget->Show(aIsActive);
     mWidget->Enable(aIsActive);
   }
-#endif // #ifndef XP_MACOSX
 }
 
 NS_IMETHODIMP
@@ -3271,10 +2385,10 @@ nsPluginInstanceOwner::GetContentsScaleFactor(double *result)
 {
   NS_ENSURE_ARG_POINTER(result);
   double scaleFactor = 1.0;
-  // On Mac, device pixels need to be translated to (and from) "display pixels"
+  // On Windows, device pixels need to be translated to (and from) "display pixels"
   // for plugins. On other platforms, plugin coordinates are always in device
   // pixels.
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   nsCOMPtr<nsIContent> content = do_QueryReferent(mContent);
   nsIPresShell* presShell = nsContentUtils::FindPresShellForDocument(content->OwnerDoc());
   if (presShell) {
diff --git a/dom/plugins/base/nsPluginInstanceOwner.h b/dom/plugins/base/nsPluginInstanceOwner.h
index 2fa67c86e0..ba16cf288c 100644
--- a/dom/plugins/base/nsPluginInstanceOwner.h
+++ b/dom/plugins/base/nsPluginInstanceOwner.h
@@ -19,11 +19,6 @@
 #include "nsWeakReference.h"
 #include "gfxRect.h"
 
-#ifdef XP_MACOSX
-#include "mozilla/gfx/QuartzSupport.h"
-#include <ApplicationServices/ApplicationServices.h>
-#endif
-
 class nsIInputStream;
 class nsPluginDOMContextMenuListener;
 class nsPluginFrame;
@@ -104,10 +99,6 @@ public:
 
 #ifdef XP_WIN
   void Paint(const RECT& aDirty, HDC aDC);
-#elif defined(XP_MACOSX)
-  void Paint(const gfxRect& aDirtyRect, CGContextRef cgContext);  
-  void RenderCoreAnimation(CGContextRef aCGContext, int aWidth, int aHeight);
-  void DoCocoaEventDrawRect(const gfxRect& aDrawRect, CGContextRef cgContext);
 #elif defined(MOZ_X11)
   void Paint(gfxContext* aContext,
              const gfxRect& aFrameRect,
@@ -132,33 +123,11 @@ public:
   nsresult SetNetscapeWindowAsParent(HWND aWindowToAdopt);
 #endif
   
-#ifdef XP_MACOSX
-  enum { ePluginPaintEnable, ePluginPaintDisable };
-
-  void WindowFocusMayHaveChanged();
-
-  bool WindowIsActive();
-  void SendWindowFocusChanged(bool aIsActive);
-  NPDrawingModel GetDrawingModel();
-  bool IsRemoteDrawingCoreAnimation();
-
-  NPEventModel GetEventModel();
-  static void CARefresh(nsITimer *aTimer, void *aClosure);
-  void AddToCARefreshTimer();
-  void RemoveFromCARefreshTimer();
-  // This calls into the plugin (NPP_SetWindow) and can run script.
-  void FixUpPluginWindow(int32_t inPaintState);
-  void HidePluginWindow();
-  // Set plugin port info in the plugin (in the 'window' member of the
-  // NPWindow structure passed to the plugin by SetWindow()).
-  void SetPluginPort();
-#else // XP_MACOSX
   void UpdateWindowPositionAndClipRect(bool aSetWindow);
   void UpdateWindowVisibility(bool aVisible);
-#endif // XP_MACOSX
 
   void ResolutionMayHaveChanged();
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   nsresult ContentsScaleFactorChanged(double aContentsScaleFactor);
 #endif
 
@@ -214,7 +183,7 @@ public:
     return mPluginWindow->type == NPWindowTypeDrawable &&
     (MatchPluginName("Shockwave Flash") ||
      MatchPluginName("Test Plug-in"));
-#elif defined(MOZ_X11) || defined(XP_MACOSX)
+#elif defined(MOZ_X11)
     return true;
 #else
     return false;
@@ -311,15 +280,6 @@ private:
   nsCOMPtr<nsIWidget>         mWidget;
   RefPtr<nsPluginHost>      mPluginHost;
   
-#ifdef XP_MACOSX
-  static nsCOMPtr<nsITimer>                *sCATimer;
-  static nsTArray<nsPluginInstanceOwner*>  *sCARefreshListeners;
-  bool                                      mSentInitialTopLevelWindowEvent;
-  bool                                      mLastWindowIsActive;
-  bool                                      mLastContentFocused;
-  // True if, the next time the window is activated, we should blur ourselves.
-  bool                                      mShouldBlurOnActivate;
-#endif
   double                                    mLastScaleFactor;
   double                                    mLastCSSZoomFactor;
   // Initially, the event loop nesting level we were created on, it's updated
@@ -335,15 +295,6 @@ private:
   bool                        mPluginWindowVisible;
   bool                        mPluginDocumentActiveState;
 
-#ifdef XP_MACOSX
-  NPEventModel mEventModel;
-  // This is a hack! UseAsyncRendering() can incorrectly return false
-  // when we don't have an object frame (possible as of bug 90268).
-  // We hack around this by always returning true if we've ever
-  // returned true.
-  bool mUseAsyncRendering;
-#endif
-  
   // pointer to wrapper for nsIDOMContextMenuListener
   RefPtr<nsPluginDOMContextMenuListener> mCXMenuListener;
   
@@ -357,16 +308,6 @@ private:
   void CallDefaultProc(const mozilla::WidgetGUIEvent* aEvent);
 #endif
 
-#ifdef XP_MACOSX
-  static NPBool ConvertPointPuppet(PuppetWidget *widget, nsPluginFrame* pluginFrame,
-                            double sourceX, double sourceY, NPCoordinateSpace sourceSpace,
-                            double *destX, double *destY, NPCoordinateSpace destSpace);
-  static NPBool ConvertPointNoPuppet(nsIWidget *widget, nsPluginFrame* pluginFrame,
-                            double sourceX, double sourceY, NPCoordinateSpace sourceSpace,
-                            double *destX, double *destY, NPCoordinateSpace destSpace);
-  void PerformDelayedBlurs();
-#endif    // XP_MACOSX
-
   int mLastMouseDownButtonType;
 
 #ifdef MOZ_X11
diff --git a/dom/plugins/base/nsPluginNativeWindow.cpp b/dom/plugins/base/nsPluginNativeWindow.cpp
index f9baf5b813..1c251936a5 100644
--- a/dom/plugins/base/nsPluginNativeWindow.cpp
+++ b/dom/plugins/base/nsPluginNativeWindow.cpp
@@ -27,7 +27,7 @@ nsPluginNativeWindowPLATFORM::nsPluginNativeWindowPLATFORM() : nsPluginNativeWin
   width = 0; 
   height = 0; 
   memset(&clipRect, 0, sizeof(clipRect));
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
   ws_info = nullptr;
 #endif
   type = NPWindowTypeWindow;
diff --git a/dom/plugins/base/nsPluginTags.cpp b/dom/plugins/base/nsPluginTags.cpp
index 5fd63f3773..3f845b5cd4 100644
--- a/dom/plugins/base/nsPluginTags.cpp
+++ b/dom/plugins/base/nsPluginTags.cpp
@@ -424,7 +424,7 @@ void nsPluginTag::InitMime(const char* const* aMimeTypes,
   }
 }
 
-#if !defined(XP_WIN) && !defined(XP_MACOSX)
+#if !defined(XP_WIN)
 static nsresult ConvertToUTF8(nsIUnicodeDecoder *aUnicodeDecoder,
                               nsAFlatCString& aString)
 {
@@ -448,7 +448,7 @@ static nsresult ConvertToUTF8(nsIUnicodeDecoder *aUnicodeDecoder,
 
 nsresult nsPluginTag::EnsureMembersAreUTF8()
 {
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
   return NS_OK;
 #else
   nsresult rv;
diff --git a/dom/plugins/ipc/NPEventOSX.h b/dom/plugins/ipc/NPEventOSX.h
deleted file mode 100644
index efb6845d04..0000000000
--- a/dom/plugins/ipc/NPEventOSX.h
+++ /dev/null
@@ -1,193 +0,0 @@
-/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef mozilla_dom_plugins_NPEventOSX_h
-#define mozilla_dom_plugins_NPEventOSX_h 1
-
-
-#include "npapi.h"
-
-namespace mozilla {
-
-namespace plugins {
-
-struct NPRemoteEvent {
-    NPCocoaEvent event;
-    double contentsScaleFactor;
-};
-
-} // namespace plugins
-
-} // namespace mozilla
-
-namespace IPC {
-
-template <>
-struct ParamTraits<mozilla::plugins::NPRemoteEvent>
-{
-    typedef mozilla::plugins::NPRemoteEvent paramType;
-
-    static void Write(Message* aMsg, const paramType& aParam)
-    {
-        aMsg->WriteInt(aParam.event.type);
-        aMsg->WriteUInt32(aParam.event.version);
-        switch (aParam.event.type) {
-            case NPCocoaEventMouseDown:
-            case NPCocoaEventMouseUp:
-            case NPCocoaEventMouseMoved:
-            case NPCocoaEventMouseEntered:
-            case NPCocoaEventMouseExited:
-            case NPCocoaEventMouseDragged:
-            case NPCocoaEventScrollWheel:
-                aMsg->WriteUInt32(aParam.event.data.mouse.modifierFlags);
-                aMsg->WriteDouble(aParam.event.data.mouse.pluginX);
-                aMsg->WriteDouble(aParam.event.data.mouse.pluginY);
-                aMsg->WriteInt32(aParam.event.data.mouse.buttonNumber);
-                aMsg->WriteInt32(aParam.event.data.mouse.clickCount);
-                aMsg->WriteDouble(aParam.event.data.mouse.deltaX);
-                aMsg->WriteDouble(aParam.event.data.mouse.deltaY);
-                aMsg->WriteDouble(aParam.event.data.mouse.deltaZ);
-                break;
-            case NPCocoaEventKeyDown:
-            case NPCocoaEventKeyUp:
-            case NPCocoaEventFlagsChanged:
-                aMsg->WriteUInt32(aParam.event.data.key.modifierFlags);
-                WriteParam(aMsg, aParam.event.data.key.characters);
-                WriteParam(aMsg, aParam.event.data.key.charactersIgnoringModifiers);
-                aMsg->WriteUnsignedChar(aParam.event.data.key.isARepeat);
-                aMsg->WriteUInt16(aParam.event.data.key.keyCode);
-                break;
-            case NPCocoaEventFocusChanged:
-            case NPCocoaEventWindowFocusChanged:
-                aMsg->WriteUnsignedChar(aParam.event.data.focus.hasFocus);
-                break;
-            case NPCocoaEventDrawRect:
-                // We don't write out the context pointer, it would always be
-                // nullptr and is just filled in as such on the read.
-                aMsg->WriteDouble(aParam.event.data.draw.x);
-                aMsg->WriteDouble(aParam.event.data.draw.y);
-                aMsg->WriteDouble(aParam.event.data.draw.width);
-                aMsg->WriteDouble(aParam.event.data.draw.height);
-                break;
-            case NPCocoaEventTextInput:
-                WriteParam(aMsg, aParam.event.data.text.text);
-                break;
-            default:
-                NS_NOTREACHED("Attempted to serialize unknown event type.");
-                return;
-        }
-        aMsg->WriteDouble(aParam.contentsScaleFactor);
-    }
-
-    static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
-    {
-        int type = 0;
-        if (!aMsg->ReadInt(aIter, &type)) {
-            return false;
-        }
-        aResult->event.type = static_cast<NPCocoaEventType>(type);
-
-        if (!aMsg->ReadUInt32(aIter, &aResult->event.version)) {
-            return false;
-        }
-
-        switch (aResult->event.type) {
-            case NPCocoaEventMouseDown:
-            case NPCocoaEventMouseUp:
-            case NPCocoaEventMouseMoved:
-            case NPCocoaEventMouseEntered:
-            case NPCocoaEventMouseExited:
-            case NPCocoaEventMouseDragged:
-            case NPCocoaEventScrollWheel:
-                if (!aMsg->ReadUInt32(aIter, &aResult->event.data.mouse.modifierFlags)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.mouse.pluginX)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.mouse.pluginY)) {
-                    return false;
-                }
-                if (!aMsg->ReadInt32(aIter, &aResult->event.data.mouse.buttonNumber)) {
-                    return false;
-                }
-                if (!aMsg->ReadInt32(aIter, &aResult->event.data.mouse.clickCount)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.mouse.deltaX)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.mouse.deltaY)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.mouse.deltaZ)) {
-                    return false;
-                }
-                break;
-            case NPCocoaEventKeyDown:
-            case NPCocoaEventKeyUp:
-            case NPCocoaEventFlagsChanged:
-                if (!aMsg->ReadUInt32(aIter, &aResult->event.data.key.modifierFlags)) {
-                    return false;
-                }
-                if (!ReadParam(aMsg, aIter, &aResult->event.data.key.characters)) {
-                    return false;
-                }
-                if (!ReadParam(aMsg, aIter, &aResult->event.data.key.charactersIgnoringModifiers)) {
-                    return false;
-                }
-                if (!aMsg->ReadUnsignedChar(aIter, &aResult->event.data.key.isARepeat)) {
-                    return false;
-                }
-                if (!aMsg->ReadUInt16(aIter, &aResult->event.data.key.keyCode)) {
-                    return false;
-                }
-                break;
-            case NPCocoaEventFocusChanged:
-            case NPCocoaEventWindowFocusChanged:
-                if (!aMsg->ReadUnsignedChar(aIter, &aResult->event.data.focus.hasFocus)) {
-                    return false;
-                }
-                break;
-            case NPCocoaEventDrawRect:
-                aResult->event.data.draw.context = nullptr;
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.draw.x)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.draw.y)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.draw.width)) {
-                    return false;
-                }
-                if (!aMsg->ReadDouble(aIter, &aResult->event.data.draw.height)) {
-                    return false;
-                }
-                break;
-            case NPCocoaEventTextInput:
-                if (!ReadParam(aMsg, aIter, &aResult->event.data.text.text)) {
-                    return false;
-                }
-                break;
-            default:
-                NS_NOTREACHED("Attempted to de-serialize unknown event type.");
-                return false;
-        }
-        if (!aMsg->ReadDouble(aIter, &aResult->contentsScaleFactor)) {
-            return false;
-        }
-
-        return true;
-    }
-
-    static void Log(const paramType& aParam, std::wstring* aLog)
-    {
-        aLog->append(L"(NPCocoaEvent)");
-    }
-};
-
-} // namespace IPC
-
-#endif // ifndef mozilla_dom_plugins_NPEventOSX_h
diff --git a/dom/plugins/ipc/PluginInstanceChild.cpp b/dom/plugins/ipc/PluginInstanceChild.cpp
index a4f6b6b517..e96ebb1473 100644
--- a/dom/plugins/ipc/PluginInstanceChild.cpp
+++ b/dom/plugins/ipc/PluginInstanceChild.cpp
@@ -103,11 +103,7 @@ using mozilla::gfx::SharedDIB;
 const int kFlashWMUSERMessageThrottleDelayMs = 5;
 
 static const TCHAR kPluginIgnoreSubclassProperty[] = TEXT("PluginIgnoreSubclassProperty");
-
-#elif defined(XP_MACOSX)
-#include <ApplicationServices/ApplicationServices.h>
-#include "PluginUtilsOSX.h"
-#endif // defined(XP_MACOSX)
+#endif
 
 /**
  * We can't use gfxPlatform::CreateDrawTargetForSurface() because calling
@@ -198,7 +194,7 @@ PluginInstanceChild::PluginInstanceChild(const NPPluginFuncs* aPluginIface,
     mWindow.type = NPWindowTypeWindow;
     mData.ndata = (void*) this;
     mData.pdata = nullptr;
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     mWindow.ws_info = &mWsInfo;
     memset(&mWsInfo, 0, sizeof(mWsInfo));
 #ifdef MOZ_WIDGET_GTK
@@ -207,7 +203,7 @@ PluginInstanceChild::PluginInstanceChild(const NPPluginFuncs* aPluginIface,
 #else
     mWsInfo.display = DefaultXDisplay();
 #endif
-#endif // MOZ_X11 && XP_UNIX && !XP_MACOSX
+#endif // MOZ_X11 && XP_UNIX
 #if defined(OS_WIN)
     InitPopupMenuHook();
     if (GetQuirks() & QUIRK_UNITY_FIXUP_MOUSE_CAPTURE) {
@@ -274,23 +270,6 @@ PluginInstanceChild::DoNPP_New()
 
     Initialize();
 
-#if defined(XP_MACOSX) && defined(__i386__)
-    // If an i386 Mac OS X plugin has selected the Carbon event model then
-    // we have to fail. We do not support putting Carbon event model plugins
-    // out of process. Note that Carbon is the default model so out of process
-    // plugins need to actively negotiate something else in order to work
-    // out of process.
-    if (EventModel() == NPEventModelCarbon) {
-      // Send notification that a plugin tried to negotiate Carbon NPAPI so that
-      // users can be notified that restarting the browser in i386 mode may allow
-      // them to use the plugin.
-      SendNegotiatedCarbon();
-
-      // Fail to instantiate.
-      rv = NPERR_MODULE_LOAD_FAILED_ERROR;
-    }
-#endif
-
     return rv;
 }
 
@@ -498,58 +477,12 @@ PluginInstanceChild::NPN_GetValue(NPNVariable aVar,
     }
 #endif
 
-#ifdef XP_MACOSX
-   case NPNVsupportsCoreGraphicsBool: {
-        *((NPBool*)aValue) = true;
-        return NPERR_NO_ERROR;
-    }
-
-    case NPNVsupportsCoreAnimationBool: {
-        *((NPBool*)aValue) = true;
-        return NPERR_NO_ERROR;
-    }
-
-    case NPNVsupportsInvalidatingCoreAnimationBool: {
-        *((NPBool*)aValue) = true;
-        return NPERR_NO_ERROR;
-    }
-
-    case NPNVsupportsCompositingCoreAnimationPluginsBool: {
-        *((NPBool*)aValue) = true;
-        return NPERR_NO_ERROR;
-    }
-
-    case NPNVsupportsCocoaBool: {
-        *((NPBool*)aValue) = true;
-        return NPERR_NO_ERROR;
-    }
-
-#ifndef NP_NO_CARBON
-    case NPNVsupportsCarbonBool: {
-      *((NPBool*)aValue) = false;
-      return NPERR_NO_ERROR;
-    }
-#endif
-
-    case NPNVsupportsUpdatedCocoaTextInputBool: {
-      *static_cast<NPBool*>(aValue) = true;
-      return NPERR_NO_ERROR;
-    }
-
-#ifndef NP_NO_QUICKDRAW
-    case NPNVsupportsQuickDrawBool: {
-        *((NPBool*)aValue) = false;
-        return NPERR_NO_ERROR;
-    }
-#endif /* NP_NO_QUICKDRAW */
-#endif /* XP_MACOSX */
-
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     case NPNVcontentsScaleFactor: {
         *static_cast<double*>(aValue) = mContentsScaleFactor;
         return NPERR_NO_ERROR;
     }
-#endif /* defined(XP_MACOSX) || defined(XP_WIN) */
+#endif /* defined(XP_WIN) */
 
     case NPNVCSSZoomFactor: {
         *static_cast<double*>(aValue) = mCSSZoomFactor;
@@ -654,36 +587,12 @@ PluginInstanceChild::NPN_SetValue(NPPVariable aVar, void* aValue)
 
         mDrawingModel = drawingModel;
 
-#ifdef XP_MACOSX
-        if (drawingModel == NPDrawingModelCoreAnimation) {
-            mCARefreshTimer = ScheduleTimer(DEFAULT_REFRESH_MS, true, CAUpdate);
-        }
-#endif
-
         PLUGIN_LOG_DEBUG(("  Plugin requested drawing model id  #%i\n",
             mDrawingModel));
 
         return rv;
     }
 
-#ifdef XP_MACOSX
-    case NPPVpluginEventModel: {
-        NPError rv;
-        int eventModel = (int16_t) (intptr_t) aValue;
-
-        if (!CallNPN_SetValue_NPPVpluginEventModel(eventModel, &rv))
-            return NPERR_GENERIC_ERROR;
-#if defined(__i386__)
-        mEventModel = static_cast<NPEventModel>(eventModel);
-#endif
-
-        PLUGIN_LOG_DEBUG(("  Plugin requested event model id # %i\n",
-            eventModel));
-
-        return rv;
-    }
-#endif
-
     case NPPVpluginIsPlayingAudio: {
         NPError rv = NPERR_GENERIC_ERROR;
         if (!CallNPN_SetValue_NPPVpluginIsPlayingAudio((NPBool)(intptr_t)aValue, &rv)) {
@@ -907,21 +816,10 @@ PluginInstanceChild::AnswerNPP_HandleEvent(const NPRemoteEvent& event,
                           event.event.xgraphicsexpose.drawable));
 #endif
 
-#ifdef XP_MACOSX
-    // Mac OS X does not define an NPEvent structure. It defines more specific types.
-    NPCocoaEvent evcopy = event.event;
-
-    // Make sure we reset mCurrentEvent in case of an exception
-    AutoRestore<const NPCocoaEvent*> savePreviousEvent(mCurrentEvent);
-
-    // Track the current event for NPN_PopUpContextMenu.
-    mCurrentEvent = &event.event;
-#else
     // Make a copy since we may modify values.
     NPEvent evcopy = event.event;
-#endif
 
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     // event.contentsScaleFactor <= 0 is a signal we shouldn't use it,
     // for example when AnswerNPP_HandleEvent() is called from elsewhere
     // in the child process (not via rpc code from the parent process).
@@ -947,18 +845,6 @@ PluginInstanceChild::AnswerNPP_HandleEvent(const NPRemoteEvent& event,
     else
         *handled = mPluginIface->event(&mData, reinterpret_cast<void*>(&evcopy));
 
-#ifdef XP_MACOSX
-    // Release any reference counted objects created in the child process.
-    if (evcopy.type == NPCocoaEventKeyDown ||
-        evcopy.type == NPCocoaEventKeyUp) {
-      ::CFRelease((CFStringRef)evcopy.data.key.characters);
-      ::CFRelease((CFStringRef)evcopy.data.key.charactersIgnoringModifiers);
-    }
-    else if (evcopy.type == NPCocoaEventTextInput) {
-      ::CFRelease((CFStringRef)evcopy.data.text.text);
-    }
-#endif
-
 #ifdef MOZ_X11
     if (GraphicsExpose == event.event.type) {
         // Make sure the X server completes the drawing before the parent
@@ -975,73 +861,6 @@ PluginInstanceChild::AnswerNPP_HandleEvent(const NPRemoteEvent& event,
     return true;
 }
 
-#ifdef XP_MACOSX
-
-bool
-PluginInstanceChild::AnswerNPP_HandleEvent_Shmem(const NPRemoteEvent& event,
-                                                 Shmem&& mem,
-                                                 int16_t* handled,
-                                                 Shmem* rtnmem)
-{
-    PLUGIN_LOG_DEBUG_FUNCTION;
-    AssertPluginThread();
-    AutoStackHelper guard(this);
-
-    PaintTracker pt;
-
-    NPCocoaEvent evcopy = event.event;
-    mContentsScaleFactor = event.contentsScaleFactor;
-
-    if (evcopy.type == NPCocoaEventDrawRect) {
-        int scaleFactor = ceil(mContentsScaleFactor);
-        if (!mShColorSpace) {
-            mShColorSpace = CreateSystemColorSpace();
-            if (!mShColorSpace) {
-                PLUGIN_LOG_DEBUG(("Could not allocate ColorSpace."));
-                *handled = false;
-                *rtnmem = mem;
-                return true;
-            } 
-        }
-        if (!mShContext) {
-            void* cgContextByte = mem.get<char>();
-            mShContext = ::CGBitmapContextCreate(cgContextByte, 
-                              mWindow.width * scaleFactor,
-                              mWindow.height * scaleFactor, 8, 
-                              mWindow.width * 4 * scaleFactor, mShColorSpace, 
-                              kCGImageAlphaPremultipliedFirst |
-                              kCGBitmapByteOrder32Host);
-    
-            if (!mShContext) {
-                PLUGIN_LOG_DEBUG(("Could not allocate CGBitmapContext."));
-                *handled = false;
-                *rtnmem = mem;
-                return true;
-            }
-        }
-        CGRect clearRect = ::CGRectMake(0, 0, mWindow.width, mWindow.height);
-        ::CGContextClearRect(mShContext, clearRect);
-        evcopy.data.draw.context = mShContext; 
-    } else {
-        PLUGIN_LOG_DEBUG(("Invalid event type for AnswerNNP_HandleEvent_Shmem."));
-        *handled = false;
-        *rtnmem = mem;
-        return true;
-    } 
-
-    if (!mPluginIface->event) {
-        *handled = false;
-    } else {
-        ::CGContextSaveGState(evcopy.data.draw.context);
-        *handled = mPluginIface->event(&mData, reinterpret_cast<void*>(&evcopy));
-        ::CGContextRestoreGState(evcopy.data.draw.context);
-    }
-
-    *rtnmem = mem;
-    return true;
-}
-
-#else
 bool
 PluginInstanceChild::AnswerNPP_HandleEvent_Shmem(const NPRemoteEvent& event,
                                                  Shmem&& mem,
@@ -1052,110 +871,15 @@ PluginInstanceChild::AnswerNPP_HandleEvent_Shmem(const NPRemoteEvent& event,
     *rtnmem = mem;
     return true;
 }
-#endif
-
-#ifdef XP_MACOSX
-
-void CallCGDraw(CGContextRef ref, void* aPluginInstance, nsIntRect aUpdateRect) {
-  PluginInstanceChild* pluginInstance = (PluginInstanceChild*)aPluginInstance;
-
-  pluginInstance->CGDraw(ref, aUpdateRect);
-}
-
-bool
-PluginInstanceChild::CGDraw(CGContextRef ref, nsIntRect aUpdateRect) {
-
-  NPCocoaEvent drawEvent;
-  drawEvent.type = NPCocoaEventDrawRect;
-  drawEvent.version = 0;
-  drawEvent.data.draw.x = aUpdateRect.x;
-  drawEvent.data.draw.y = aUpdateRect.y;
-  drawEvent.data.draw.width = aUpdateRect.width;
-  drawEvent.data.draw.height = aUpdateRect.height;
-  drawEvent.data.draw.context = ref;
-
-  NPRemoteEvent remoteDrawEvent = {drawEvent};
-  // Signal to AnswerNPP_HandleEvent() not to use this value
-  remoteDrawEvent.contentsScaleFactor = -1.0;
-
-  int16_t handled;
-  AnswerNPP_HandleEvent(remoteDrawEvent, &handled);
-  return handled == true;
-}
 
 bool
 PluginInstanceChild::AnswerNPP_HandleEvent_IOSurface(const NPRemoteEvent& event,
                                                      const uint32_t &surfaceid,
                                                      int16_t* handled)
 {
-    PLUGIN_LOG_DEBUG_FUNCTION;
-    AssertPluginThread();
-    AutoStackHelper guard(this);
-
-    PaintTracker pt;
-
-    NPCocoaEvent evcopy = event.event;
-    mContentsScaleFactor = event.contentsScaleFactor;
-    RefPtr<MacIOSurface> surf = MacIOSurface::LookupSurface(surfaceid,
-                                                            mContentsScaleFactor);
-    if (!surf) {
-        NS_ERROR("Invalid IOSurface.");
-        *handled = false;
-        return false;
-    }
-
-    if (!mCARenderer) {
-      mCARenderer = new nsCARenderer();
-    }
-
-    if (evcopy.type == NPCocoaEventDrawRect) {
-        mCARenderer->AttachIOSurface(surf);
-        if (!mCARenderer->isInit()) {
-            void *caLayer = nullptr;
-            NPError result = mPluginIface->getvalue(GetNPP(), 
-                                     NPPVpluginCoreAnimationLayer,
-                                     &caLayer);
-            
-            if (result != NPERR_NO_ERROR || !caLayer) {
-                PLUGIN_LOG_DEBUG(("Plugin requested CoreAnimation but did not "
-                                  "provide CALayer."));
-                *handled = false;
-                return false;
-            }
-
-            mCARenderer->SetupRenderer(caLayer, mWindow.width, mWindow.height,
-                            mContentsScaleFactor,
-                            GetQuirks() & QUIRK_ALLOW_OFFLINE_RENDERER ?
-                            ALLOW_OFFLINE_RENDERER : DISALLOW_OFFLINE_RENDERER);
-
-            // Flash needs to have the window set again after this step
-            if (mPluginIface->setwindow)
-                (void) mPluginIface->setwindow(&mData, &mWindow);
-        }
-    } else {
-        PLUGIN_LOG_DEBUG(("Invalid event type for "
-                          "AnswerNNP_HandleEvent_IOSurface."));
-        *handled = false;
-        return false;
-    } 
-
-    mCARenderer->Render(mWindow.width, mWindow.height,
-                        mContentsScaleFactor, nullptr);
-
-    return true;
-
-}
-
-#else
-bool
-PluginInstanceChild::AnswerNPP_HandleEvent_IOSurface(const NPRemoteEvent& event,
-                                                     const uint32_t &surfaceid,
-                                                     int16_t* handled)
-{
     NS_RUNTIMEABORT("NPP_HandleEvent_IOSurface is a OSX-only message");
     return false;
 }
-#endif
 
 bool
 PluginInstanceChild::RecvWindowPosChanged(const NPRemoteEvent& event)
@@ -1175,24 +899,16 @@ PluginInstanceChild::RecvWindowPosChanged(const NPRemoteEvent& event)
 bool
 PluginInstanceChild::RecvContentsScaleFactorChanged(const double& aContentsScaleFactor)
 {
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     mContentsScaleFactor = aContentsScaleFactor;
-#if defined(XP_MACOSX)
-    if (mShContext) {
-        // Release the shared context so that it is reallocated
-        // with the new size. 
-        ::CGContextRelease(mShContext);
-        mShContext = nullptr;
-    }
-#endif
     return true;
 #else
-    NS_RUNTIMEABORT("ContentsScaleFactorChanged is an Windows or OSX only message");
+    NS_RUNTIMEABORT("ContentsScaleFactorChanged is a Windows-only message");
     return false;
 #endif
 }
 
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
 // Create a new window from NPWindow
 bool PluginInstanceChild::CreateWindow(const NPRemoteWindow& aWindow)
 { 
@@ -1290,7 +1006,7 @@ PluginInstanceChild::AnswerNPP_SetWindow(const NPRemoteWindow& aWindow)
     AssertPluginThread();
     AutoStackHelper guard(this);
 
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     NS_ASSERTION(mWsInfo.display, "We should have a valid display!");
 
     // The minimum info is sent over IPC to allow this
@@ -1407,26 +1123,6 @@ PluginInstanceChild::AnswerNPP_SetWindow(const NPRemoteWindow& aWindow)
       break;
     }
 
-#elif defined(XP_MACOSX)
-
-    mWindow.x = aWindow.x;
-    mWindow.y = aWindow.y;
-    mWindow.width = aWindow.width;
-    mWindow.height = aWindow.height;
-    mWindow.clipRect = aWindow.clipRect;
-    mWindow.type = aWindow.type;
-    mContentsScaleFactor = aWindow.contentsScaleFactor;
-
-    if (mShContext) {
-        // Release the shared context so that it is reallocated
-        // with the new size. 
-        ::CGContextRelease(mShContext);
-        mShContext = nullptr;
-    }
-
-    if (mPluginIface->setwindow)
-        (void) mPluginIface->setwindow(&mData, &mWindow);
-
 #elif defined(MOZ_WIDGET_UIKIT)
     // Don't care
 #else
@@ -3372,7 +3068,7 @@ PluginInstanceChild::DoAsyncSetWindow(const gfxSurfaceType& aSurfaceType,
     mWindow.height = aWindow.height;
     mWindow.clipRect = aWindow.clipRect;
     mWindow.type = aWindow.type;
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     mContentsScaleFactor = aWindow.contentsScaleFactor;
 #endif
 
@@ -3564,60 +3260,6 @@ PluginInstanceChild::EnsureCurrentBuffer(void)
         NS_ERROR("Cannot create helper surface");
         return false;
     }
-
-    return true;
-#elif defined(XP_MACOSX)
-
-    if (!mDoubleBufferCARenderer.HasCALayer()) {
-        void *caLayer = nullptr;
-        if (mDrawingModel == NPDrawingModelCoreGraphics) {
-            if (!mCGLayer) {
-                caLayer = mozilla::plugins::PluginUtilsOSX::GetCGLayer(CallCGDraw,
-                                                                       this,
-                                                                       mContentsScaleFactor);
-
-                if (!caLayer) {
-                    PLUGIN_LOG_DEBUG(("GetCGLayer failed."));
-                    return false;
-                }
-            }
-            mCGLayer = caLayer;
-        } else {
-            NPError result = mPluginIface->getvalue(GetNPP(),
-                                     NPPVpluginCoreAnimationLayer,
-                                     &caLayer);
-            if (result != NPERR_NO_ERROR || !caLayer) {
-                PLUGIN_LOG_DEBUG(("Plugin requested CoreAnimation but did not "
-                                  "provide CALayer."));
-                return false;
-            }
-        }
-        mDoubleBufferCARenderer.SetCALayer(caLayer);
-    }
-
-    if (mDoubleBufferCARenderer.HasFrontSurface() &&
-        (mDoubleBufferCARenderer.GetFrontSurfaceWidth() != mWindow.width ||
-         mDoubleBufferCARenderer.GetFrontSurfaceHeight() != mWindow.height ||
-         mDoubleBufferCARenderer.GetContentsScaleFactor() != mContentsScaleFactor)) {
-        mDoubleBufferCARenderer.ClearFrontSurface();
-    }
-
-    if (!mDoubleBufferCARenderer.HasFrontSurface()) {
-        bool allocSurface = mDoubleBufferCARenderer.InitFrontSurface(
-                                mWindow.width, mWindow.height, mContentsScaleFactor,
-                                GetQuirks() & QUIRK_ALLOW_OFFLINE_RENDERER ?
-                                ALLOW_OFFLINE_RENDERER : DISALLOW_OFFLINE_RENDERER);
-        if (!allocSurface) {
-            PLUGIN_LOG_DEBUG(("Fail to allocate front IOSurface"));
-            return false;
-        }
-
-        if (mPluginIface->setwindow)
-            (void) mPluginIface->setwindow(&mData, &mWindow);
-
-        nsIntRect toInvalidate(0, 0, mWindow.width, mWindow.height);
-        mAccumulatedInvalidRect.UnionRect(mAccumulatedInvalidRect, toInvalidate);
-    }
 #endif
     return true;
 }
@@ -3662,8 +3304,6 @@ PluginInstanceChild::UpdateWindowAttributes(bool aForceSetWindow)
         return;
     }
 
-#ifndef XP_MACOSX
-    // Adjusting the window isn't needed for OSX
 #ifndef XP_WIN
     // On Windows, we translate the device context, in order for the window
     // origin to be correct.
@@ -3684,7 +3324,6 @@ PluginInstanceChild::UpdateWindowAttributes(bool aForceSetWindow)
         mWindow.clipRect.right = clipRect.XMost();
         mWindow.clipRect.bottom = clipRect.YMost();
     }
-#endif // XP_MACOSX
 
 #ifdef XP_WIN
     // Windowless plugins on Windows need a WM_WINDOWPOSCHANGED event to update
@@ -4655,7 +4294,7 @@ PluginInstanceChild::Destroy()
       xt_client_xloop_destroy();
     }
 #endif
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     DeleteWindow();
 #endif
 }
diff --git a/dom/plugins/ipc/PluginInstanceChild.h b/dom/plugins/ipc/PluginInstanceChild.h
index 0ad6e145d7..e07431c52a 100644
--- a/dom/plugins/ipc/PluginInstanceChild.h
+++ b/dom/plugins/ipc/PluginInstanceChild.h
@@ -206,7 +206,7 @@ protected:
     virtual bool
     RecvNPP_DidComposite() override;
 
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     bool CreateWindow(const NPRemoteWindow& aWindow);
     void DeleteWindow();
 #endif
@@ -456,7 +456,7 @@ private:
     PluginScriptableObjectChild* mCachedWindowActor;
     PluginScriptableObjectChild* mCachedElementActor;
 
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     NPSetWindowCallbackStruct mWsInfo;
 #ifdef MOZ_WIDGET_GTK
     bool mXEmbed;
@@ -520,15 +520,10 @@ private:
     bool CanPaintOnBackground();
 
     bool IsVisible() {
-#ifdef XP_MACOSX
-        return mWindow.clipRect.top != mWindow.clipRect.bottom &&
-               mWindow.clipRect.left != mWindow.clipRect.right;
-#else
         return mWindow.clipRect.top != 0 ||
             mWindow.clipRect.left != 0 ||
             mWindow.clipRect.bottom != 0 ||
             mWindow.clipRect.right != 0;
-#endif
     }
 
     // ShowPluginFrame - in general does four things:
@@ -609,12 +604,6 @@ private:
     // surface which is on ParentProcess side
     RefPtr<gfxASurface> mBackSurface;
 
-#ifdef XP_MACOSX
-    // Current IOSurface available for rendering
-    // We can't use thebes gfxASurface like other platforms.
-    PluginUtilsOSX::nsDoubleBufferCARenderer mDoubleBufferCARenderer; 
-#endif
-
     // (Not to be confused with mBackSurface).  This is a recent copy
     // of the opaque pixels under our object frame, if
     // |mIsTransparent|.  We ask the plugin render directly onto a
diff --git a/dom/plugins/ipc/PluginInstanceParent.cpp b/dom/plugins/ipc/PluginInstanceParent.cpp
index 523dc5c803..2e29f8e6bc 100644
--- a/dom/plugins/ipc/PluginInstanceParent.cpp
+++ b/dom/plugins/ipc/PluginInstanceParent.cpp
@@ -50,10 +50,6 @@
 # include "mozilla/layers/TextureD3D11.h"
 #endif
 
-#ifdef XP_MACOSX
-#include "MacIOSurfaceImage.h"
-#endif
-
 #if defined(OS_WIN)
 #include <windowsx.h>
 #include "gfxWindowsPlatform.h"
@@ -67,9 +63,7 @@ extern const wchar_t* kFlashFullscreenClass;
 #elif defined(MOZ_WIDGET_GTK)
 #include "mozilla/dom/ContentChild.h"
 #include <gdk/gdk.h>
-#elif defined(XP_MACOSX)
-#include <ApplicationServices/ApplicationServices.h>
-#endif // defined(XP_MACOSX)
+#endif
 
 using namespace mozilla;
 using namespace mozilla::plugins;
@@ -134,11 +128,6 @@ PluginInstanceParent::PluginInstanceParent(PluginModuleParent* parent,
     , mPluginWndProc(nullptr)
     , mNestedEventState(false)
 #endif // defined(XP_WIN)
-#if defined(XP_MACOSX)
-    , mShWidth(0)
-    , mShHeight(0)
-    , mShColorSpace(nullptr)
-#endif
 {
 #if defined(OS_WIN)
     if (!sPluginInstanceList) {
@@ -458,14 +447,7 @@ PluginInstanceParent::AnswerNPN_SetValue_NPPVpluginDrawingModel(
     bool allowed = false;
 
     switch (drawingModel) {
-#if defined(XP_MACOSX)
-        case NPDrawingModelCoreAnimation:
-        case NPDrawingModelInvalidatingCoreAnimation:
-        case NPDrawingModelOpenGL:
-        case NPDrawingModelCoreGraphics:
-            allowed = true;
-            break;
-#elif defined(XP_WIN)
+#if defined(XP_WIN)
         case NPDrawingModelSyncWin:
             allowed = true;
             break;
@@ -494,16 +476,6 @@ PluginInstanceParent::AnswerNPN_SetValue_NPPVpluginDrawingModel(
 
     int requestModel = drawingModel;
 
-#ifdef XP_MACOSX
-    if (drawingModel == NPDrawingModelCoreAnimation ||
-        drawingModel == NPDrawingModelInvalidatingCoreAnimation) {
-        // We need to request CoreGraphics otherwise
-        // the nsPluginFrame will try to draw a CALayer
-        // that can not be shared across process.
-        requestModel = NPDrawingModelCoreGraphics;
-    }
-#endif
-
     *result = mNPNIface->setvalue(mNPP, NPPVpluginDrawingModel,
                                   (void*)(intptr_t)requestModel);
 
@@ -514,14 +486,8 @@ bool
 PluginInstanceParent::AnswerNPN_SetValue_NPPVpluginEventModel(
     const int& eventModel, NPError* result)
 {
-#ifdef XP_MACOSX
-    *result = mNPNIface->setvalue(mNPP, NPPVpluginEventModel,
-                                  (void*)(intptr_t)eventModel);
-    return true;
-#else
     *result = NPERR_GENERIC_ERROR;
     return true;
-#endif
 }
 
 bool
@@ -877,35 +843,6 @@ PluginInstanceParent::RecvShow(const NPRect& updatedRect,
         }
         surface = gfxSharedImageSurface::Open(newSurface.get_Shmem());
     }
-#ifdef XP_MACOSX
-    else if (newSurface.type() == SurfaceDescriptor::TIOSurfaceDescriptor) {
-        IOSurfaceDescriptor iodesc = newSurface.get_IOSurfaceDescriptor();
-
-        RefPtr<MacIOSurface> newIOSurface =
-          MacIOSurface::LookupSurface(iodesc.surfaceId(),
-                                      iodesc.contentsScaleFactor());
-
-        if (!newIOSurface) {
-            NS_WARNING("Got bad IOSurfaceDescriptor in RecvShow");
-            return false;
-        }
-
-        if (mFrontIOSurface)
-            *prevSurface = IOSurfaceDescriptor(mFrontIOSurface->GetIOSurfaceID(),
-                                               mFrontIOSurface->GetContentsScaleFactor());
-        else
-            *prevSurface = null_t();
-
-        mFrontIOSurface = newIOSurface;
-
-        RecvNPN_InvalidateRect(updatedRect);
-
-        PLUGIN_LOG_DEBUG(("   (RecvShow invalidated for surface %p)",
-                          mFrontSurface.get()));
-
-        return true;
-    }
-#endif
 #ifdef MOZ_X11
     else if (newSurface.type() == SurfaceDescriptor::TSurfaceDescriptorX11) {
         surface = newSurface.get_SurfaceDescriptorX11().OpenForeign();
@@ -988,7 +925,7 @@ PluginInstanceParent::AsyncSetWindow(NPWindow* aWindow)
     window.height = aWindow->height;
     window.clipRect = aWindow->clipRect;
     window.type = aWindow->type;
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     double scaleFactor = 1.0;
     mNPNIface->getvalue(mNPP, NPNVcontentsScaleFactor, &scaleFactor);
     window.contentsScaleFactor = scaleFactor;
@@ -1018,19 +955,7 @@ PluginInstanceParent::GetImageContainer(ImageContainer** aContainer)
         return NS_OK;
     }
 
-#ifdef XP_MACOSX
-    MacIOSurface* ioSurface = nullptr;
-
-    if (mFrontIOSurface) {
-      ioSurface = mFrontIOSurface;
-    } else if (mIOSurface) {
-      ioSurface = mIOSurface;
-    }
-
-    if (!mFrontSurface && !ioSurface)
-#else
     if (!mFrontSurface)
-#endif
         return NS_ERROR_NOT_AVAILABLE;
 
     ImageContainer *container = GetImageContainer();
@@ -1039,17 +964,6 @@ PluginInstanceParent::GetImageContainer(ImageContainer** aContainer)
         return NS_ERROR_FAILURE;
     }
 
-#ifdef XP_MACOSX
-    if (ioSurface) {
-        RefPtr<Image> image = new MacIOSurfaceImage(ioSurface);
-        container->SetCurrentImageInTransaction(image);
-
-        NS_IF_ADDREF(container);
-        *aContainer = container;
-        return NS_OK;
-    }
-#endif
-
     NS_IF_ADDREF(container);
     *aContainer = container;
     return NS_OK;
@@ -1072,16 +986,6 @@ PluginInstanceParent::GetImageSize(nsIntSize* aSize)
         return NS_OK;
     }
 
-#ifdef XP_MACOSX
-    if (mFrontIOSurface) {
-        *aSize = nsIntSize(mFrontIOSurface->GetWidth(), mFrontIOSurface->GetHeight());
-        return NS_OK;
-    } else if (mIOSurface) {
-        *aSize = nsIntSize(mIOSurface->GetWidth(), mIOSurface->GetHeight());
-        return NS_OK;
-    }
-#endif
-
     return NS_ERROR_NOT_AVAILABLE;
 }
 
@@ -1094,23 +998,14 @@ PluginInstanceParent::DidComposite()
     Unused << SendNPP_DidComposite();
 }
 
-#ifdef XP_MACOSX
-nsresult
-PluginInstanceParent::IsRemoteDrawingCoreAnimation(bool *aDrawing)
-{
-    *aDrawing = (NPDrawingModelCoreAnimation == (NPDrawingModel)mDrawingModel ||
-                 NPDrawingModelInvalidatingCoreAnimation == (NPDrawingModel)mDrawingModel);
-    return NS_OK;
-}
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
 nsresult
 PluginInstanceParent::ContentsScaleFactorChanged(double aContentsScaleFactor)
 {
     bool rv = SendContentsScaleFactorChanged(aContentsScaleFactor);
     return rv ? NS_OK : NS_ERROR_FAILURE;
 }
-#endif // #ifdef XP_MACOSX
+#endif // #ifdef XP_WIN
 
 nsresult
 PluginInstanceParent::SetBackgroundUnknown()
@@ -1362,40 +1257,14 @@ PluginInstanceParent::NPP_SetWindow(const NPWindow* aWindow)
     window.type = aWindow->type;
 #endif
 
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     double floatScaleFactor = 1.0;
     mNPNIface->getvalue(mNPP, NPNVcontentsScaleFactor, &floatScaleFactor);
     int scaleFactor = ceil(floatScaleFactor);
     window.contentsScaleFactor = floatScaleFactor;
 #endif
-#if defined(XP_MACOSX)
-    if (mShWidth != window.width * scaleFactor || mShHeight != window.height * scaleFactor) {
-        if (mDrawingModel == NPDrawingModelCoreAnimation ||
-            mDrawingModel == NPDrawingModelInvalidatingCoreAnimation) {
-            mIOSurface = MacIOSurface::CreateIOSurface(window.width, window.height,
-                                                       floatScaleFactor);
-        } else if (uint32_t(mShWidth * mShHeight) !=
-                   window.width * scaleFactor * window.height * scaleFactor) {
-            if (mShWidth != 0 && mShHeight != 0) {
-                DeallocShmem(mShSurface);
-                mShWidth = 0;
-                mShHeight = 0;
-            }
-
-            if (window.width != 0 && window.height != 0) {
-                if (!AllocShmem(window.width * scaleFactor * window.height*4 * scaleFactor,
-                                SharedMemory::TYPE_BASIC, &mShSurface)) {
-                    PLUGIN_LOG_DEBUG(("Shared memory could not be allocated."));
-                    return NPERR_GENERIC_ERROR;
-                }
-            }
-        }
-        mShWidth = window.width * scaleFactor;
-        mShHeight = window.height * scaleFactor;
-    }
-#endif
 
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     const NPSetWindowCallbackStruct* ws_info =
       static_cast<NPSetWindowCallbackStruct*>(aWindow->ws_info);
     window.visualID = ws_info->visual ? ws_info->visual->visualid : 0;
@@ -1556,14 +1425,10 @@ PluginInstanceParent::NPP_HandleEvent(void* event)
 {
     PLUGIN_LOG_DEBUG_FUNCTION;
 
-#if defined(XP_MACOSX)
-    NPCocoaEvent* npevent = reinterpret_cast<NPCocoaEvent*>(event);
-#else
     NPEvent* npevent = reinterpret_cast<NPEvent*>(event);
-#endif
     NPRemoteEvent npremoteevent;
     npremoteevent.event = *npevent;
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     double scaleFactor = 1.0;
     mNPNIface->getvalue(mNPP, NPNVcontentsScaleFactor, &scaleFactor);
     npremoteevent.contentsScaleFactor = scaleFactor;
@@ -1653,111 +1518,6 @@ PluginInstanceParent::NPP_HandleEvent(void* event)
     }
 #endif
 
-#ifdef XP_MACOSX
-    if (npevent->type == NPCocoaEventDrawRect) {
-        if (mDrawingModel == NPDrawingModelCoreAnimation ||
-            mDrawingModel == NPDrawingModelInvalidatingCoreAnimation) {
-            if (!mIOSurface) {
-                NS_ERROR("No IOSurface allocated.");
-                return false;
-            }
-            if (!CallNPP_HandleEvent_IOSurface(npremoteevent,
-                                               mIOSurface->GetIOSurfaceID(),
-                                               &handled))
-                return false; // no good way to handle errors here...
-
-            CGContextRef cgContext = npevent->data.draw.context;
-            if (!mShColorSpace) {
-                mShColorSpace = CreateSystemColorSpace();
-            }
-            if (!mShColorSpace) {
-                PLUGIN_LOG_DEBUG(("Could not allocate ColorSpace."));
-                return false;
-            }
-            if (cgContext) {
-                nsCARenderer::DrawSurfaceToCGContext(cgContext, mIOSurface,
-                                                     mShColorSpace,
-                                                     npevent->data.draw.x,
-                                                     npevent->data.draw.y,
-                                                     npevent->data.draw.width,
-                                                     npevent->data.draw.height);
-            }
-            return true;
-        } else if (mFrontIOSurface) {
-            CGContextRef cgContext = npevent->data.draw.context;
-            if (!mShColorSpace) {
-                mShColorSpace = CreateSystemColorSpace();
-            }
-            if (!mShColorSpace) {
-                PLUGIN_LOG_DEBUG(("Could not allocate ColorSpace."));
-                return false;
-            }
-            if (cgContext) {
-                nsCARenderer::DrawSurfaceToCGContext(cgContext, mFrontIOSurface,
-                                                     mShColorSpace,
-                                                     npevent->data.draw.x,
-                                                     npevent->data.draw.y,
-                                                     npevent->data.draw.width,
-                                                     npevent->data.draw.height);
-            }
-            return true;
-        } else {
-            if (mShWidth == 0 && mShHeight == 0) {
-                PLUGIN_LOG_DEBUG(("NPCocoaEventDrawRect on window of size 0."));
-                return false;
-            }
-            if (!mShSurface.IsReadable()) {
-                PLUGIN_LOG_DEBUG(("Shmem is not readable."));
-                return false;
-            }
-
-            if (!CallNPP_HandleEvent_Shmem(npremoteevent, mShSurface,
-                                           &handled, &mShSurface))
-                return false; // no good way to handle errors here...
-
-            if (!mShSurface.IsReadable()) {
-                PLUGIN_LOG_DEBUG(("Shmem not returned. Either the plugin crashed "
-                                  "or we have a bug."));
-                return false;
-            }
-
-            char* shContextByte = mShSurface.get<char>();
-
-            if (!mShColorSpace) {
-                mShColorSpace = CreateSystemColorSpace();
-            }
-            if (!mShColorSpace) {
-                PLUGIN_LOG_DEBUG(("Could not allocate ColorSpace."));
-                return false;
-            }
-            CGContextRef shContext = ::CGBitmapContextCreate(shContextByte,
-                                    mShWidth, mShHeight, 8,
-                                    mShWidth*4, mShColorSpace,
-                                    kCGImageAlphaPremultipliedFirst |
-                                    kCGBitmapByteOrder32Host);
-            if (!shContext) {
-                PLUGIN_LOG_DEBUG(("Could not allocate CGBitmapContext."));
-                return false;
-            }
-
-            CGImageRef shImage = ::CGBitmapContextCreateImage(shContext);
-            if (shImage) {
-                CGContextRef cgContext = npevent->data.draw.context;
-
-                ::CGContextDrawImage(cgContext,
-                                     CGRectMake(0,0,mShWidth,mShHeight),
-                                     shImage);
-                ::CGImageRelease(shImage);
-            } else {
-                ::CGContextRelease(shContext);
-                return false;
-            }
-            ::CGContextRelease(shContext);
-            return true;
-        }
-    }
-#endif
-
     if (!CallNPP_HandleEvent(npremoteevent, &handled))
         return 0; // no good way to handle errors here...
 
diff --git a/dom/plugins/ipc/PluginInstanceParent.h b/dom/plugins/ipc/PluginInstanceParent.h
index b2feafacc6..80d04242ca 100644
--- a/dom/plugins/ipc/PluginInstanceParent.h
+++ b/dom/plugins/ipc/PluginInstanceParent.h
@@ -322,10 +322,7 @@ public:
     nsresult AsyncSetWindow(NPWindow* window);
     nsresult GetImageContainer(mozilla::layers::ImageContainer** aContainer);
     nsresult GetImageSize(nsIntSize* aSize);
-#ifdef XP_MACOSX
-    nsresult IsRemoteDrawingCoreAnimation(bool *aDrawing);
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     nsresult ContentsScaleFactorChanged(double aContentsScaleFactor);
 #endif
     nsresult SetBackgroundUnknown();
diff --git a/dom/plugins/ipc/PluginInterposeOSX.h b/dom/plugins/ipc/PluginInterposeOSX.h
deleted file mode 100644
index 2a742b8aa2..0000000000
--- a/dom/plugins/ipc/PluginInterposeOSX.h
+++ /dev/null
@@ -1,137 +0,0 @@
-// vim:set ts=2 sts=2 sw=2 et cin:
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef DOM_PLUGINS_IPC_PLUGININTERPOSEOSX_H
-#define DOM_PLUGINS_IPC_PLUGININTERPOSEOSX_H
-
-#include "base/basictypes.h"
-#include "nsPoint.h"
-#include "npapi.h"
-
-// Make this includable from non-Objective-C code.
-#ifndef __OBJC__
-class NSCursor;
-#else
-#import <Cocoa/Cocoa.h>
-#endif
-
-// The header file QuickdrawAPI.h is missing on OS X 10.7 and up (though the
-// QuickDraw APIs defined in it are still present) -- so we need to supply the
-// relevant parts of its contents here.  It's likely that Apple will eventually
-// remove the APIs themselves (probably in OS X 10.8), so we need to make them
-// weak imports, and test for their presence before using them.
-#if !defined(__QUICKDRAWAPI__)
-
-typedef short Bits16[16];
-struct Cursor {
-  Bits16  data;
-  Bits16  mask;
-  Point   hotSpot;
-};
-typedef struct Cursor Cursor;
-
-#endif /* __QUICKDRAWAPI__ */
-
-namespace mac_plugin_interposing {
-
-// Class used to serialize NSCursor objects over IPC between processes.
-class NSCursorInfo {
-public:
-  enum Type {
-    TypeCustom,
-    TypeArrow,
-    TypeClosedHand,
-    TypeContextualMenu,   // Only supported on OS X 10.6 and up
-    TypeCrosshair,
-    TypeDisappearingItem,
-    TypeDragCopy,         // Only supported on OS X 10.6 and up
-    TypeDragLink,         // Only supported on OS X 10.6 and up
-    TypeIBeam,
-    TypeNotAllowed,       // Only supported on OS X 10.6 and up
-    TypeOpenHand,
-    TypePointingHand,
-    TypeResizeDown,
-    TypeResizeLeft,
-    TypeResizeLeftRight,
-    TypeResizeRight,
-    TypeResizeUp,
-    TypeResizeUpDown,
-    TypeTransparent       // Special type
-  };
-
-  NSCursorInfo();
-  explicit NSCursorInfo(NSCursor* aCursor);
-  explicit NSCursorInfo(const Cursor* aCursor);
-  ~NSCursorInfo();
-
-  NSCursor* GetNSCursor() const;
-  Type GetType() const;
-  const char* GetTypeName() const;
-  nsPoint GetHotSpot() const;
-  uint8_t* GetCustomImageData() const;
-  uint32_t GetCustomImageDataLength() const;
-
-  void SetType(Type aType);
-  void SetHotSpot(nsPoint aHotSpot);
-  void SetCustomImageData(uint8_t* aData, uint32_t aDataLength);
-
-  static bool GetNativeCursorsSupported();
-
-private:
-  NSCursor* GetTransparentCursor() const;
-
-  Type mType;
-  // The hot spot's coordinate system is the cursor's coordinate system, and
-  // has an upper-left origin (in both Cocoa and pre-Cocoa systems).
-  nsPoint mHotSpot;
-  uint8_t* mCustomImageData;
-  uint32_t mCustomImageDataLength;
-  static int32_t mNativeCursorsSupported;
-};
-
-namespace parent {
-
-void OnPluginShowWindow(uint32_t window_id, CGRect window_bounds, bool modal);
-void OnPluginHideWindow(uint32_t window_id, pid_t aPluginPid);
-void OnSetCursor(const NSCursorInfo& cursorInfo);
-void OnShowCursor(bool show);
-void OnPushCursor(const NSCursorInfo& cursorInfo);
-void OnPopCursor();
-
-} // namespace parent
-
-namespace child {
-
-void SetUpCocoaInterposing();
-
-} // namespace child
-
-} // namespace mac_plugin_interposing
-
-#endif /* DOM_PLUGINS_IPC_PLUGININTERPOSEOSX_H */
diff --git a/dom/plugins/ipc/PluginInterposeOSX.mm b/dom/plugins/ipc/PluginInterposeOSX.mm
deleted file mode 100644
index bf24d2b0d8..0000000000
--- a/dom/plugins/ipc/PluginInterposeOSX.mm
+++ /dev/null
@@ -1,1158 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-// vim:set ts=2 sts=2 sw=2 et cin:
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//    * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//    * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//    * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "base/basictypes.h"
-#include "nsCocoaUtils.h"
-#include "PluginModuleChild.h"
-#include "nsDebug.h"
-#include "PluginInterposeOSX.h"
-#include <set>
-#import <AppKit/AppKit.h>
-#import <objc/runtime.h>
-#import <Carbon/Carbon.h>
-
-using namespace mozilla::plugins;
-
-namespace mac_plugin_interposing {
-
-int32_t NSCursorInfo::mNativeCursorsSupported = -1;
-
-// This constructor may be called from the browser process or the plugin
-// process.
-NSCursorInfo::NSCursorInfo()
-  : mType(TypeArrow)
-  , mHotSpot(nsPoint(0, 0))
-  , mCustomImageData(NULL)
-  , mCustomImageDataLength(0)
-{
-}
-
-NSCursorInfo::NSCursorInfo(NSCursor* aCursor)
-  : mType(TypeArrow)
-  , mHotSpot(nsPoint(0, 0))
-  , mCustomImageData(NULL)
-  , mCustomImageDataLength(0)
-{
-  // This constructor is only ever called from the plugin process, so the
-  // following is safe.
-  if (!GetNativeCursorsSupported()) {
-    return;
-  }
-
-  NSPoint hotSpotCocoa = [aCursor hotSpot];
-  mHotSpot = nsPoint(hotSpotCocoa.x, hotSpotCocoa.y);
-
-  Class nsCursorClass = [NSCursor class];
-  if ([aCursor isEqual:[NSCursor arrowCursor]]) {
-    mType = TypeArrow;
-  } else if ([aCursor isEqual:[NSCursor closedHandCursor]]) {
-    mType = TypeClosedHand;
-  } else if ([aCursor isEqual:[NSCursor crosshairCursor]]) {
-    mType = TypeCrosshair;
-  } else if ([aCursor isEqual:[NSCursor disappearingItemCursor]]) {
-    mType = TypeDisappearingItem;
-  } else if ([aCursor isEqual:[NSCursor IBeamCursor]]) {
-    mType = TypeIBeam;
-  } else if ([aCursor isEqual:[NSCursor openHandCursor]]) {
-    mType = TypeOpenHand;
-  } else if ([aCursor isEqual:[NSCursor pointingHandCursor]]) {
-    mType = TypePointingHand;
-  } else if ([aCursor isEqual:[NSCursor resizeDownCursor]]) {
-    mType = TypeResizeDown;
-  } else if ([aCursor isEqual:[NSCursor resizeLeftCursor]]) {
-    mType = TypeResizeLeft;
-  } else if ([aCursor isEqual:[NSCursor resizeLeftRightCursor]]) {
-    mType = TypeResizeLeftRight;
-  } else if ([aCursor isEqual:[NSCursor resizeRightCursor]]) {
-    mType = TypeResizeRight;
-  } else if ([aCursor isEqual:[NSCursor resizeUpCursor]]) {
-    mType = TypeResizeUp;
-  } else if ([aCursor isEqual:[NSCursor resizeUpDownCursor]]) {
-    mType = TypeResizeUpDown;
-  // The following cursor types are only supported on OS X 10.6 and up.
-  } else if ([nsCursorClass respondsToSelector:@selector(contextualMenuCursor)] &&
-             [aCursor isEqual:[nsCursorClass performSelector:@selector(contextualMenuCursor)]]) {
-    mType = TypeContextualMenu;
-  } else if ([nsCursorClass respondsToSelector:@selector(dragCopyCursor)] &&
-             [aCursor isEqual:[nsCursorClass performSelector:@selector(dragCopyCursor)]]) {
-    mType = TypeDragCopy;
-  } else if ([nsCursorClass respondsToSelector:@selector(dragLinkCursor)] &&
-             [aCursor isEqual:[nsCursorClass performSelector:@selector(dragLinkCursor)]]) {
-    mType = TypeDragLink;
-  } else if ([nsCursorClass respondsToSelector:@selector(operationNotAllowedCursor)] &&
-             [aCursor isEqual:[nsCursorClass performSelector:@selector(operationNotAllowedCursor)]]) {
-    mType = TypeNotAllowed;
-  } else {
-    NSImage* image = [aCursor image];
-    NSArray* reps = image ? [image representations] : nil;
-    NSUInteger repsCount = reps ? [reps count] : 0;
-    if (!repsCount) {
-      // If we have a custom cursor with no image representations, assume we
-      // need a transparent cursor.
-      mType = TypeTransparent;
-    } else {
-      CGImageRef cgImage = nil;
-      // XXX We don't know how to deal with a cursor that doesn't have a
-      //     bitmap image representation.  For now we fall back to an arrow
-      //     cursor.
-      for (NSUInteger i = 0; i < repsCount; ++i) {
-        id rep = [reps objectAtIndex:i];
-        if ([rep isKindOfClass:[NSBitmapImageRep class]]) {
-          cgImage = [(NSBitmapImageRep*)rep CGImage];
-          break;
-        }
-      }
-      if (cgImage) {
-        CFMutableDataRef data = ::CFDataCreateMutable(kCFAllocatorDefault, 0);
-        if (data) {
-          CGImageDestinationRef dest = ::CGImageDestinationCreateWithData(data,
-                                                                          kUTTypePNG,
-                                                                          1,
-                                                                          NULL);
-          if (dest) {
-            ::CGImageDestinationAddImage(dest, cgImage, NULL);
-            if (::CGImageDestinationFinalize(dest)) {
-              uint32_t dataLength = (uint32_t) ::CFDataGetLength(data);
-              mCustomImageData = (uint8_t*) moz_xmalloc(dataLength);
-              ::CFDataGetBytes(data, ::CFRangeMake(0, dataLength), mCustomImageData);
-              mCustomImageDataLength = dataLength;
-              mType = TypeCustom;
-            }
-            ::CFRelease(dest);
-          }
-          ::CFRelease(data);
-        }
-      }
-      if (!mCustomImageData) {
-        mType = TypeArrow;
-      }
-    }
-  }
-}
-
-NSCursorInfo::NSCursorInfo(const Cursor* aCursor)
-  : mType(TypeArrow)
-  , mHotSpot(nsPoint(0, 0))
-  , mCustomImageData(NULL)
-  , mCustomImageDataLength(0)
-{
-  // This constructor is only ever called from the plugin process, so the
-  // following is safe.
-  if (!GetNativeCursorsSupported()) {
-    return;
-  }
-
-  mHotSpot = nsPoint(aCursor->hotSpot.h, aCursor->hotSpot.v);
-
-  int width = 16, height = 16;
-  int bytesPerPixel = 4;
-  int rowBytes = width * bytesPerPixel;
-  int bitmapSize = height * rowBytes;
-
-  bool isTransparent = true;
-
-  uint8_t* bitmap = (uint8_t*) moz_xmalloc(bitmapSize);
-  // The way we create 'bitmap' is largely "borrowed" from Chrome's
-  // WebCursor::InitFromCursor().
-  for (int y = 0; y < height; ++y) {
-    unsigned short data = aCursor->data[y];
-    unsigned short mask = aCursor->mask[y];
-    // Change 'data' and 'mask' from big-endian to little-endian, but output
-    // big-endian data below.
-    data = ((data << 8) & 0xFF00) | ((data >> 8) & 0x00FF);
-    mask = ((mask << 8) & 0xFF00) | ((mask >> 8) & 0x00FF);
-    // It'd be nice to use a gray-scale bitmap.  But
-    // CGBitmapContextCreateImage() (used below) won't work with one that also
-    // has alpha values.
-    for (int x = 0; x < width; ++x) {
-      int offset = (y * rowBytes) + (x * bytesPerPixel);
-      // Color value
-      if (data & 0x8000) {
-        bitmap[offset]     = 0x0;
-        bitmap[offset + 1] = 0x0;
-        bitmap[offset + 2] = 0x0;
-      } else {
-        bitmap[offset]     = 0xFF;
-        bitmap[offset + 1] = 0xFF;
-        bitmap[offset + 2] = 0xFF;
-      }
-      // Mask value
-      if (mask & 0x8000) {
-        bitmap[offset + 3] = 0xFF;
-        isTransparent = false;
-      } else {
-        bitmap[offset + 3] = 0x0;
-      }
-      data <<= 1;
-      mask <<= 1;
-    }
-  }
-
-  if (isTransparent) {
-    // If aCursor is transparent, we don't need to serialize custom cursor
-    // data over IPC.
-    mType = TypeTransparent;
-  } else {
-    CGColorSpaceRef color = ::CGColorSpaceCreateDeviceRGB();
-    if (color) {
-      CGContextRef context =
-        ::CGBitmapContextCreate(bitmap,
-                                width,
-                                height,
-                                8,
-                                rowBytes,
-                                color,
-                                kCGImageAlphaPremultipliedLast |
-                                  kCGBitmapByteOrder32Big);
-      if (context) {
-        CGImageRef image = ::CGBitmapContextCreateImage(context);
-        if (image) {
-          ::CFMutableDataRef data = ::CFDataCreateMutable(kCFAllocatorDefault, 0);
-          if (data) {
-            CGImageDestinationRef dest =
-              ::CGImageDestinationCreateWithData(data,
-                                                 kUTTypePNG,
-                                                 1,
-                                                 NULL);
-            if (dest) {
-              ::CGImageDestinationAddImage(dest, image, NULL);
-              if (::CGImageDestinationFinalize(dest)) {
-                uint32_t dataLength = (uint32_t) ::CFDataGetLength(data);
-                mCustomImageData = (uint8_t*) moz_xmalloc(dataLength);
-                ::CFDataGetBytes(data,
-                                 ::CFRangeMake(0, dataLength),
-                                 mCustomImageData);
-                mCustomImageDataLength = dataLength;
-                mType = TypeCustom;
-              }
-              ::CFRelease(dest);
-            }
-            ::CFRelease(data);
-          }
-          ::CGImageRelease(image);
-        }
-        ::CGContextRelease(context);
-      }
-      ::CGColorSpaceRelease(color);
-    }
-  }
-
-  free(bitmap);
-}
-
-NSCursorInfo::~NSCursorInfo()
-{
-  if (mCustomImageData) {
-    free(mCustomImageData);
-  }
-}
-
-NSCursor* NSCursorInfo::GetNSCursor() const
-{
-  NSCursor* retval = nil;
-
-  Class nsCursorClass = [NSCursor class];
-  switch(mType) {
-    case TypeArrow:
-      retval = [NSCursor arrowCursor];
-      break;
-    case TypeClosedHand:
-      retval = [NSCursor closedHandCursor];
-      break;
-    case TypeCrosshair:
-      retval = [NSCursor crosshairCursor];
-      break;
-    case TypeDisappearingItem:
-      retval = [NSCursor disappearingItemCursor];
-      break;
-    case TypeIBeam:
-      retval = [NSCursor IBeamCursor];
-      break;
-    case TypeOpenHand:
-      retval = [NSCursor openHandCursor];
-      break;
-    case TypePointingHand:
-      retval = [NSCursor pointingHandCursor];
-      break;
-    case TypeResizeDown:
-      retval = [NSCursor resizeDownCursor];
-      break;
-    case TypeResizeLeft:
-      retval = [NSCursor resizeLeftCursor];
-      break;
-    case TypeResizeLeftRight:
-      retval = [NSCursor resizeLeftRightCursor];
-      break;
-    case TypeResizeRight:
-      retval = [NSCursor resizeRightCursor];
-      break;
-    case TypeResizeUp:
-      retval = [NSCursor resizeUpCursor];
-      break;
-    case TypeResizeUpDown:
-      retval = [NSCursor resizeUpDownCursor];
-      break;
-    // The following four cursor types are only supported on OS X 10.6 and up.
-    case TypeContextualMenu: {
-      if ([nsCursorClass respondsToSelector:@selector(contextualMenuCursor)]) {
-        retval = [nsCursorClass performSelector:@selector(contextualMenuCursor)];
-      }
-      break;
-    }
-    case TypeDragCopy: {
-      if ([nsCursorClass respondsToSelector:@selector(dragCopyCursor)]) {
-        retval = [nsCursorClass performSelector:@selector(dragCopyCursor)];
-      }
-      break;
-    }
-    case TypeDragLink: {
-      if ([nsCursorClass respondsToSelector:@selector(dragLinkCursor)]) {
-        retval = [nsCursorClass performSelector:@selector(dragLinkCursor)];
-      }
-      break;
-    }
-    case TypeNotAllowed: {
-      if ([nsCursorClass respondsToSelector:@selector(operationNotAllowedCursor)]) {
-        retval = [nsCursorClass performSelector:@selector(operationNotAllowedCursor)];
-      }
-      break;
-    }
-    case TypeTransparent:
-      retval = GetTransparentCursor();
-      break;
-    default:
-      break;
-  }
-
-  if (!retval && mCustomImageData && mCustomImageDataLength) {
-    CGDataProviderRef provider = ::CGDataProviderCreateWithData(NULL,
-                                                                (const void*)mCustomImageData,
-                                                                mCustomImageDataLength,
-                                                                NULL);
-    if (provider) {
-      CGImageRef cgImage = ::CGImageCreateWithPNGDataProvider(provider,
-                                                              NULL,
-                                                              false,
-                                                              kCGRenderingIntentDefault);
-      if (cgImage) {
-        NSBitmapImageRep* rep = [[NSBitmapImageRep alloc] initWithCGImage:cgImage];
-        if (rep) {
-          NSImage* image = [[NSImage alloc] init];
-          if (image) {
-            [image addRepresentation:rep];
-            retval = [[[NSCursor alloc] initWithImage:image 
-                                              hotSpot:NSMakePoint(mHotSpot.x, mHotSpot.y)]
-                      autorelease];
-            [image release];
-          }
-          [rep release];
-        }
-        ::CGImageRelease(cgImage);
-      }
-      ::CFRelease(provider);
-    }
-  }
-
-  // Fall back to an arrow cursor if need be.
-  if (!retval) {
-    retval = [NSCursor arrowCursor];
-  }
-
-  return retval;
-}
-
-// Get a transparent cursor with the appropriate hot spot.  We need one if
-// (for example) we have a custom cursor with no image data.
-NSCursor* NSCursorInfo::GetTransparentCursor() const
-{
-  NSCursor* retval = nil;
-
-  int width = 16, height = 16;
-  int bytesPerPixel = 2;
-  int rowBytes = width * bytesPerPixel;
-  int dataSize = height * rowBytes;
-
-  uint8_t* data = (uint8_t*) moz_xmalloc(dataSize);
-  for (int y = 0; y < height; ++y) {
-    for (int x = 0; x < width; ++x) {
-      int offset = (y * rowBytes) + (x * bytesPerPixel);
-      data[offset] = 0x7E;  // Arbitrary gray-scale value
-      data[offset + 1] = 0; // Alpha value to make us transparent
-    }
-  }
-
-  NSBitmapImageRep* imageRep =
-    [[[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil
-                                             pixelsWide:width
-                                             pixelsHigh:height
-                                          bitsPerSample:8
-                                        samplesPerPixel:2
-                                               hasAlpha:YES
-                                               isPlanar:NO
-                                         colorSpaceName:NSCalibratedWhiteColorSpace
-                                            bytesPerRow:rowBytes
-                                           bitsPerPixel:16]
-     autorelease];
-  if (imageRep) {
-    uint8_t* repDataPtr = [imageRep bitmapData];
-    if (repDataPtr) {
-      memcpy(repDataPtr, data, dataSize);
-      NSImage *image =
-        [[[NSImage alloc] initWithSize:NSMakeSize(width, height)]
-         autorelease];
-      if (image) {
-        [image addRepresentation:imageRep];
-        retval =
-          [[[NSCursor alloc] initWithImage:image
-                                   hotSpot:NSMakePoint(mHotSpot.x, mHotSpot.y)]
-           autorelease];
-      }
-    }
-  }
-
-  free(data);
-
-  // Fall back to an arrow cursor if (for some reason) the above code failed.
-  if (!retval) {
-    retval = [NSCursor arrowCursor];
-  }
-
-  return retval;
-}
-
-NSCursorInfo::Type NSCursorInfo::GetType() const
-{
-  return mType;
-}
-
-const char* NSCursorInfo::GetTypeName() const
-{
-  switch(mType) {
-    case TypeCustom:
-      return "TypeCustom";
-    case TypeArrow:
-      return "TypeArrow";
-    case TypeClosedHand:
-      return "TypeClosedHand";
-    case TypeContextualMenu:
-      return "TypeContextualMenu";
-    case TypeCrosshair:
-      return "TypeCrosshair";
-    case TypeDisappearingItem:
-      return "TypeDisappearingItem";
-    case TypeDragCopy:
-      return "TypeDragCopy";
-    case TypeDragLink:
-      return "TypeDragLink";
-    case TypeIBeam:
-      return "TypeIBeam";
-    case TypeNotAllowed:
-      return "TypeNotAllowed";
-    case TypeOpenHand:
-      return "TypeOpenHand";
-    case TypePointingHand:
-      return "TypePointingHand";
-    case TypeResizeDown:
-      return "TypeResizeDown";
-    case TypeResizeLeft:
-      return "TypeResizeLeft";
-    case TypeResizeLeftRight:
-      return "TypeResizeLeftRight";
-    case TypeResizeRight:
-      return "TypeResizeRight";
-    case TypeResizeUp:
-      return "TypeResizeUp";
-    case TypeResizeUpDown:
-      return "TypeResizeUpDown";
-    case TypeTransparent:
-      return "TypeTransparent";
-    default:
-      break;
-  }
-  return "TypeUnknown";
-}
-
-nsPoint NSCursorInfo::GetHotSpot() const
-{
-  return mHotSpot;
-}
-
-uint8_t* NSCursorInfo::GetCustomImageData() const
-{
-  return mCustomImageData;
-}
-
-uint32_t NSCursorInfo::GetCustomImageDataLength() const
-{
-  return mCustomImageDataLength;
-}
-
-void NSCursorInfo::SetType(Type aType)
-{
-  mType = aType;
-}
-
-void NSCursorInfo::SetHotSpot(nsPoint aHotSpot)
-{
-  mHotSpot = aHotSpot;
-}
-
-void NSCursorInfo::SetCustomImageData(uint8_t* aData, uint32_t aDataLength)
-{
-  if (mCustomImageData) {
-    free(mCustomImageData);
-  }
-  if (aDataLength) {
-    mCustomImageData = (uint8_t*) moz_xmalloc(aDataLength);
-    memcpy(mCustomImageData, aData, aDataLength);
-  } else {
-    mCustomImageData = NULL;
-  }
-  mCustomImageDataLength = aDataLength;
-}
-
-// This should never be called from the browser process -- only from the
-// plugin process.
-bool NSCursorInfo::GetNativeCursorsSupported()
-{
-  if (mNativeCursorsSupported == -1) {
-    ENSURE_PLUGIN_THREAD(false);
-    PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-    if (pmc) {
-      bool result = pmc->GetNativeCursorsSupported();
-      if (result) {
-        mNativeCursorsSupported = 1;
-      } else {
-        mNativeCursorsSupported = 0;
-      }
-    }
-  }
-  return (mNativeCursorsSupported == 1);
-}
-
-} // namespace mac_plugin_interposing
-
-namespace mac_plugin_interposing {
-namespace parent {
-
-// Tracks plugin windows currently visible.
-std::set<uint32_t> plugin_visible_windows_set_;
-// Tracks full screen windows currently visible.
-std::set<uint32_t> plugin_fullscreen_windows_set_;
-// Tracks modal windows currently visible.
-std::set<uint32_t> plugin_modal_windows_set_;
-
-void OnPluginShowWindow(uint32_t window_id,
-                        CGRect window_bounds,
-                        bool modal) {
-  plugin_visible_windows_set_.insert(window_id);
-
-  if (modal)
-    plugin_modal_windows_set_.insert(window_id);
-
-  CGRect main_display_bounds = ::CGDisplayBounds(CGMainDisplayID());
-
-  if (CGRectEqualToRect(window_bounds, main_display_bounds) &&
-      (plugin_fullscreen_windows_set_.find(window_id) ==
-       plugin_fullscreen_windows_set_.end())) {
-    plugin_fullscreen_windows_set_.insert(window_id);
-
-    nsCocoaUtils::HideOSChromeOnScreen(true);
-  }
-}
-
-static void ActivateProcess(pid_t pid) {
-  ProcessSerialNumber process;
-  OSStatus status = ::GetProcessForPID(pid, &process);
-
-  if (status == noErr) {
-    SetFrontProcess(&process);
-  } else {
-    NS_WARNING("Unable to get process for pid.");
-  }
-}
-
-// Must be called on the UI thread.
-// If plugin_pid is -1, the browser will be the active process on return,
-// otherwise that process will be given focus back before this function returns.
-static void ReleasePluginFullScreen(pid_t plugin_pid) {
-  // Releasing full screen only works if we are the frontmost process; grab
-  // focus, but give it back to the plugin process if requested.
-  ActivateProcess(base::GetCurrentProcId());
-
-  nsCocoaUtils::HideOSChromeOnScreen(false);
-
-  if (plugin_pid != -1) {
-    ActivateProcess(plugin_pid);
-  }
-}
-
-void OnPluginHideWindow(uint32_t window_id, pid_t aPluginPid) {
-  bool had_windows = !plugin_visible_windows_set_.empty();
-  plugin_visible_windows_set_.erase(window_id);
-  bool browser_needs_activation = had_windows &&
-      plugin_visible_windows_set_.empty();
-
-  plugin_modal_windows_set_.erase(window_id);
-  if (plugin_fullscreen_windows_set_.find(window_id) !=
-      plugin_fullscreen_windows_set_.end()) {
-    plugin_fullscreen_windows_set_.erase(window_id);
-    pid_t plugin_pid = browser_needs_activation ? -1 : aPluginPid;
-    browser_needs_activation = false;
-    ReleasePluginFullScreen(plugin_pid);
-  }
-
-  if (browser_needs_activation) {
-    ActivateProcess(getpid());
-  }
-}
-
-void OnSetCursor(const NSCursorInfo& cursorInfo)
-{
-  NSCursor* aCursor = cursorInfo.GetNSCursor();
-  if (aCursor) {
-    [aCursor set];
-  }
-}
-
-void OnShowCursor(bool show)
-{
-  if (show) {
-    [NSCursor unhide];
-  } else {
-    [NSCursor hide];
-  }
-}
-
-void OnPushCursor(const NSCursorInfo& cursorInfo)
-{
-  NSCursor* aCursor = cursorInfo.GetNSCursor();
-  if (aCursor) {
-    [aCursor push];
-  }
-}
-
-void OnPopCursor()
-{
-  [NSCursor pop];
-}
-
-} // namespace parent
-} // namespace mac_plugin_interposing
-
-namespace mac_plugin_interposing {
-namespace child {
-
-// TODO(stuartmorgan): Make this an IPC to order the plugin process above the
-// browser process only if the browser is current frontmost.
-void FocusPluginProcess() {
-  ProcessSerialNumber this_process, front_process;
-  if ((GetCurrentProcess(&this_process) != noErr) ||
-      (GetFrontProcess(&front_process) != noErr)) {
-    return;
-  }
-
-  Boolean matched = false;
-  if ((SameProcess(&this_process, &front_process, &matched) == noErr) &&
-      !matched) {
-    SetFrontProcess(&this_process);
-  }
-}
-
-void NotifyBrowserOfPluginShowWindow(uint32_t window_id, CGRect bounds,
-                                     bool modal) {
-  ENSURE_PLUGIN_THREAD_VOID();
-
-  PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-  if (pmc)
-    pmc->PluginShowWindow(window_id, modal, bounds);
-}
-
-void NotifyBrowserOfPluginHideWindow(uint32_t window_id, CGRect bounds) {
-  ENSURE_PLUGIN_THREAD_VOID();
-
-  PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-  if (pmc)
-    pmc->PluginHideWindow(window_id);
-}
-
-void NotifyBrowserOfSetCursor(NSCursorInfo& aCursorInfo)
-{
-  ENSURE_PLUGIN_THREAD_VOID();
-  PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-  if (pmc) {
-    pmc->SetCursor(aCursorInfo);
-  }
-}
-
-void NotifyBrowserOfShowCursor(bool show)
-{
-  ENSURE_PLUGIN_THREAD_VOID();
-  PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-  if (pmc) {
-    pmc->ShowCursor(show);
-  }
-}
-
-void NotifyBrowserOfPushCursor(NSCursorInfo& aCursorInfo)
-{
-  ENSURE_PLUGIN_THREAD_VOID();
-  PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-  if (pmc) {
-    pmc->PushCursor(aCursorInfo);
-  }
-}
-
-void NotifyBrowserOfPopCursor()
-{
-  ENSURE_PLUGIN_THREAD_VOID();
-  PluginModuleChild *pmc = PluginModuleChild::GetChrome();
-  if (pmc) {
-    pmc->PopCursor();
-  }
-}
-
-struct WindowInfo {
-  uint32_t window_id;
-  CGRect bounds;
-  explicit WindowInfo(NSWindow* aWindow) {
-    NSInteger window_num = [aWindow windowNumber];
-    window_id = window_num > 0 ? window_num : 0;
-    bounds = NSRectToCGRect([aWindow frame]);
-  }
-};
-
-static void OnPluginWindowClosed(const WindowInfo& window_info) {
-  if (window_info.window_id == 0)
-    return;
-  mac_plugin_interposing::child::NotifyBrowserOfPluginHideWindow(window_info.window_id,
-                                                                 window_info.bounds);
-}
-
-static void OnPluginWindowShown(const WindowInfo& window_info, BOOL is_modal) {
-  // The window id is 0 if it has never been shown (including while it is the
-  // process of being shown for the first time); when that happens, we'll catch
-  // it in _setWindowNumber instead.
-  static BOOL s_pending_display_is_modal = NO;
-  if (window_info.window_id == 0) {
-    if (is_modal)
-      s_pending_display_is_modal = YES;
-    return;
-  }
-  if (s_pending_display_is_modal) {
-    is_modal = YES;
-    s_pending_display_is_modal = NO;
-  }
-  mac_plugin_interposing::child::NotifyBrowserOfPluginShowWindow(
-    window_info.window_id, window_info.bounds, is_modal);
-}
-
-static BOOL OnSetCursor(NSCursorInfo &aInfo)
-{
-  if (NSCursorInfo::GetNativeCursorsSupported()) {
-    NotifyBrowserOfSetCursor(aInfo);
-    return YES;
-  }
-  return NO;
-}
-
-static BOOL OnHideCursor()
-{
-  if (NSCursorInfo::GetNativeCursorsSupported()) {
-    NotifyBrowserOfShowCursor(NO);
-    return YES;
-  }
-  return NO;
-}
-
-static BOOL OnUnhideCursor()
-{
-  if (NSCursorInfo::GetNativeCursorsSupported()) {
-    NotifyBrowserOfShowCursor(YES);
-    return YES;
-  }
-  return NO;
-}
-
-static BOOL OnPushCursor(NSCursorInfo &aInfo)
-{
-  if (NSCursorInfo::GetNativeCursorsSupported()) {
-    NotifyBrowserOfPushCursor(aInfo);
-    return YES;
-  }
-  return NO;
-}
-
-static BOOL OnPopCursor()
-{
-  if (NSCursorInfo::GetNativeCursorsSupported()) {
-    NotifyBrowserOfPopCursor();
-    return YES;
-  }
-  return NO;
-}
-
-} // namespace child
-} // namespace mac_plugin_interposing
-
-using namespace mac_plugin_interposing::child;
-
-@interface NSWindow (PluginInterposing)
-- (void)pluginInterpose_orderOut:(id)sender;
-- (void)pluginInterpose_orderFront:(id)sender;
-- (void)pluginInterpose_makeKeyAndOrderFront:(id)sender;
-- (void)pluginInterpose_setWindowNumber:(NSInteger)num;
-@end
-
-@implementation NSWindow (PluginInterposing)
-
-- (void)pluginInterpose_orderOut:(id)sender {
-  WindowInfo window_info(self);
-  [self pluginInterpose_orderOut:sender];
-  OnPluginWindowClosed(window_info);
-}
-
-- (void)pluginInterpose_orderFront:(id)sender {
-  mac_plugin_interposing::child::FocusPluginProcess();
-  [self pluginInterpose_orderFront:sender];
-  OnPluginWindowShown(WindowInfo(self), NO);
-}
-
-- (void)pluginInterpose_makeKeyAndOrderFront:(id)sender {
-  mac_plugin_interposing::child::FocusPluginProcess();
-  [self pluginInterpose_makeKeyAndOrderFront:sender];
-  OnPluginWindowShown(WindowInfo(self), NO);
-}
-
-- (void)pluginInterpose_setWindowNumber:(NSInteger)num {
-  if (num > 0)
-    mac_plugin_interposing::child::FocusPluginProcess();
-  [self pluginInterpose_setWindowNumber:num];
-  if (num > 0)
-    OnPluginWindowShown(WindowInfo(self), NO);
-}
-
-@end
-
-@interface NSApplication (PluginInterposing)
-- (NSInteger)pluginInterpose_runModalForWindow:(NSWindow*)window;
-@end
-
-@implementation NSApplication (PluginInterposing)
-
-- (NSInteger)pluginInterpose_runModalForWindow:(NSWindow*)window {
-  mac_plugin_interposing::child::FocusPluginProcess();
-  // This is out-of-order relative to the other calls, but runModalForWindow:
-  // won't return until the window closes, and the order only matters for
-  // full-screen windows.
-  OnPluginWindowShown(WindowInfo(window), YES);
-  return [self pluginInterpose_runModalForWindow:window];
-}
-
-@end
-
-// Hook commands to manipulate the current cursor, so that they can be passed
-// from the child process to the parent process.  These commands have no
-// effect unless they're performed in the parent process.
-@interface NSCursor (PluginInterposing)
-- (void)pluginInterpose_set;
-- (void)pluginInterpose_push;
-- (void)pluginInterpose_pop;
-+ (NSCursor*)pluginInterpose_currentCursor;
-+ (void)pluginInterpose_hide;
-+ (void)pluginInterpose_unhide;
-+ (void)pluginInterpose_pop;
-@end
-
-// Cache the results of [NSCursor set], [NSCursor push] and [NSCursor pop].
-// The last element is always the current cursor.
-static NSMutableArray* gCursorStack = nil;
-
-static BOOL initCursorStack()
-{
-  if (!gCursorStack) {
-    gCursorStack = [[NSMutableArray arrayWithCapacity:5] retain];
-  }
-  return (gCursorStack != NULL);
-}
-
-static NSCursor* currentCursorFromCache()
-{
-  if (!initCursorStack())
-    return nil;
-  return (NSCursor*) [gCursorStack lastObject];
-}
-
-static void setCursorInCache(NSCursor* aCursor)
-{
-  if (!initCursorStack() || !aCursor)
-    return;
-  NSUInteger count = [gCursorStack count];
-  if (count) {
-    [gCursorStack replaceObjectAtIndex:count - 1 withObject:aCursor];
-  } else {
-    [gCursorStack addObject:aCursor];
-  }
-}
-
-static void pushCursorInCache(NSCursor* aCursor)
-{
-  if (!initCursorStack() || !aCursor)
-    return;
-  [gCursorStack addObject:aCursor];
-}
-
-static void popCursorInCache()
-{
-  if (!initCursorStack())
-    return;
-  // Apple's doc on the +[NSCursor pop] method says:  "If the current cursor
-  // is the only cursor on the stack, this method does nothing."
-  if ([gCursorStack count] > 1) {
-    [gCursorStack removeLastObject];
-  }
-}
-
-@implementation NSCursor (PluginInterposing)
-
-- (void)pluginInterpose_set
-{
-  NSCursorInfo info(self);
-  OnSetCursor(info);
-  setCursorInCache(self);
-  [self pluginInterpose_set];
-}
-
-- (void)pluginInterpose_push
-{
-  NSCursorInfo info(self);
-  OnPushCursor(info);
-  pushCursorInCache(self);
-  [self pluginInterpose_push];
-}
-
-- (void)pluginInterpose_pop
-{
-  OnPopCursor();
-  popCursorInCache();
-  [self pluginInterpose_pop];
-}
-
-// The currentCursor method always returns nil when running in a background
-// process.  But this may confuse plugins (notably Flash, see bug 621117).  So
-// if we get a nil return from the "call to super", we return a cursor that's
-// been cached by previous calls to set or push.  According to Apple's docs,
-// currentCursor "only returns the cursor set by your application using
-// NSCursor methods".  So we don't need to worry about changes to the cursor
-// made by other methods like SetThemeCursor().
-+ (NSCursor*)pluginInterpose_currentCursor
-{
-  NSCursor* retval = [self pluginInterpose_currentCursor];
-  if (!retval) {
-    retval = currentCursorFromCache();
-  }
-  return retval;
-}
-
-+ (void)pluginInterpose_hide
-{
-  OnHideCursor();
-  [self pluginInterpose_hide];
-}
-
-+ (void)pluginInterpose_unhide
-{
-  OnUnhideCursor();
-  [self pluginInterpose_unhide];
-}
-
-+ (void)pluginInterpose_pop
-{
-  OnPopCursor();
-  popCursorInCache();
-  [self pluginInterpose_pop];
-}
-
-@end
-
-static void ExchangeMethods(Class target_class,
-                            BOOL class_method,
-                            SEL original,
-                            SEL replacement) {
-  Method m1;
-  Method m2;
-  if (class_method) {
-    m1 = class_getClassMethod(target_class, original);
-    m2 = class_getClassMethod(target_class, replacement);
-  } else {
-    m1 = class_getInstanceMethod(target_class, original);
-    m2 = class_getInstanceMethod(target_class, replacement);
-  }
-
-  if (m1 == m2)
-    return;
-
-  if (m1 && m2)
-    method_exchangeImplementations(m1, m2);
-  else
-    NS_NOTREACHED("Cocoa swizzling failed");
-}
-
-namespace mac_plugin_interposing {
-namespace child {
-
-void SetUpCocoaInterposing() {
-  Class nswindow_class = [NSWindow class];
-  ExchangeMethods(nswindow_class, NO, @selector(orderOut:),
-                  @selector(pluginInterpose_orderOut:));
-  ExchangeMethods(nswindow_class, NO, @selector(orderFront:),
-                  @selector(pluginInterpose_orderFront:));
-  ExchangeMethods(nswindow_class, NO, @selector(makeKeyAndOrderFront:),
-                  @selector(pluginInterpose_makeKeyAndOrderFront:));
-  ExchangeMethods(nswindow_class, NO, @selector(_setWindowNumber:),
-                  @selector(pluginInterpose_setWindowNumber:));
-
-  ExchangeMethods([NSApplication class], NO, @selector(runModalForWindow:),
-                  @selector(pluginInterpose_runModalForWindow:));
-
-  Class nscursor_class = [NSCursor class];
-  ExchangeMethods(nscursor_class, NO, @selector(set),
-                  @selector(pluginInterpose_set));
-  ExchangeMethods(nscursor_class, NO, @selector(push),
-                  @selector(pluginInterpose_push));
-  ExchangeMethods(nscursor_class, NO, @selector(pop),
-                  @selector(pluginInterpose_pop));
-  ExchangeMethods(nscursor_class, YES, @selector(currentCursor),
-                  @selector(pluginInterpose_currentCursor));
-  ExchangeMethods(nscursor_class, YES, @selector(hide),
-                  @selector(pluginInterpose_hide));
-  ExchangeMethods(nscursor_class, YES, @selector(unhide),
-                  @selector(pluginInterpose_unhide));
-  ExchangeMethods(nscursor_class, YES, @selector(pop),
-                  @selector(pluginInterpose_pop));
-}
-
-}  // namespace child
-}  // namespace mac_plugin_interposing
-
-// Called from plugin_child_interpose.mm, which hooks calls to
-// SetCursor() (the QuickDraw call) from the plugin child process.
-extern "C" NS_VISIBILITY_DEFAULT BOOL
-mac_plugin_interposing_child_OnSetCursor(const Cursor* cursor)
-{
-  NSCursorInfo info(cursor);
-  return OnSetCursor(info);
-}
-
-// Called from plugin_child_interpose.mm, which hooks calls to
-// SetThemeCursor() (the Appearance Manager call) from the plugin child
-// process.
-extern "C" NS_VISIBILITY_DEFAULT BOOL
-mac_plugin_interposing_child_OnSetThemeCursor(ThemeCursor cursor)
-{
-  NSCursorInfo info;
-  switch (cursor) {
-    case kThemeArrowCursor:
-      info.SetType(NSCursorInfo::TypeArrow);
-      break;
-    case kThemeCopyArrowCursor:
-      info.SetType(NSCursorInfo::TypeDragCopy);
-      break;
-    case kThemeAliasArrowCursor:
-      info.SetType(NSCursorInfo::TypeDragLink);
-      break;
-    case kThemeContextualMenuArrowCursor:
-      info.SetType(NSCursorInfo::TypeContextualMenu);
-      break;
-    case kThemeIBeamCursor:
-      info.SetType(NSCursorInfo::TypeIBeam);
-      break;
-    case kThemeCrossCursor:
-    case kThemePlusCursor:
-      info.SetType(NSCursorInfo::TypeCrosshair);
-      break;
-    case kThemeWatchCursor:
-    case kThemeSpinningCursor:
-      info.SetType(NSCursorInfo::TypeArrow);
-      break;
-    case kThemeClosedHandCursor:
-      info.SetType(NSCursorInfo::TypeClosedHand);
-      break;
-    case kThemeOpenHandCursor:
-      info.SetType(NSCursorInfo::TypeOpenHand);
-      break;
-    case kThemePointingHandCursor:
-    case kThemeCountingUpHandCursor:
-    case kThemeCountingDownHandCursor:
-    case kThemeCountingUpAndDownHandCursor:
-      info.SetType(NSCursorInfo::TypePointingHand);
-      break;
-    case kThemeResizeLeftCursor:
-      info.SetType(NSCursorInfo::TypeResizeLeft);
-      break;
-    case kThemeResizeRightCursor:
-      info.SetType(NSCursorInfo::TypeResizeRight);
-      break;
-    case kThemeResizeLeftRightCursor:
-      info.SetType(NSCursorInfo::TypeResizeLeftRight);
-      break;
-    case kThemeNotAllowedCursor:
-      info.SetType(NSCursorInfo::TypeNotAllowed);
-      break;
-    case kThemeResizeUpCursor:
-      info.SetType(NSCursorInfo::TypeResizeUp);
-      break;
-    case kThemeResizeDownCursor:
-      info.SetType(NSCursorInfo::TypeResizeDown);
-      break;
-    case kThemeResizeUpDownCursor:
-      info.SetType(NSCursorInfo::TypeResizeUpDown);
-      break;
-    case kThemePoofCursor:
-      info.SetType(NSCursorInfo::TypeDisappearingItem);
-      break;
-    default:
-      info.SetType(NSCursorInfo::TypeArrow);
-      break;
-  }
-  return OnSetCursor(info);
-}
-
-extern "C" NS_VISIBILITY_DEFAULT BOOL
-mac_plugin_interposing_child_OnHideCursor()
-{
-  return OnHideCursor();
-}
-
-extern "C" NS_VISIBILITY_DEFAULT BOOL
-mac_plugin_interposing_child_OnShowCursor()
-{
-  return OnUnhideCursor();
-}
diff --git a/dom/plugins/ipc/PluginLibrary.h b/dom/plugins/ipc/PluginLibrary.h
index 2f9a3f81b2..50182d0b0d 100644
--- a/dom/plugins/ipc/PluginLibrary.h
+++ b/dom/plugins/ipc/PluginLibrary.h
@@ -57,7 +57,7 @@ public:
 
   virtual bool HasRequiredFunctions() = 0;
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
   virtual nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPPluginFuncs* pFuncs, NPError* error) = 0;
 #else
   virtual nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error) = 0;
@@ -66,7 +66,7 @@ public:
   virtual nsresult NP_GetMIMEDescription(const char** mimeDesc) = 0;
   virtual nsresult NP_GetValue(void *future, NPPVariable aVariable,
                                void *aValue, NPError* error) = 0;
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
   virtual nsresult NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error) = 0;
 #endif
   virtual nsresult NPP_New(NPMIMEType pluginType, NPP instance,
@@ -83,10 +83,7 @@ public:
   virtual nsresult GetImageSize(NPP instance, nsIntSize* aSize) = 0;
   virtual void DidComposite(NPP instance) = 0;
   virtual bool IsOOP() = 0;
-#if defined(XP_MACOSX)
-  virtual nsresult IsRemoteDrawingCoreAnimation(NPP instance, bool *aDrawing) = 0;
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   virtual nsresult ContentsScaleFactorChanged(NPP instance, double aContentsScaleFactor) = 0;
 #endif
 #if defined(XP_WIN)
diff --git a/dom/plugins/ipc/PluginMessageUtils.cpp b/dom/plugins/ipc/PluginMessageUtils.cpp
index be1b2d15a5..9b27c76d5a 100644
--- a/dom/plugins/ipc/PluginMessageUtils.cpp
+++ b/dom/plugins/ipc/PluginMessageUtils.cpp
@@ -49,13 +49,10 @@ namespace plugins {
 
 NPRemoteWindow::NPRemoteWindow() :
   window(0), x(0), y(0), width(0), height(0), type(NPWindowTypeDrawable)
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
   , visualID(0)
   , colormap(0)
 #endif /* XP_UNIX */
-#if defined(XP_MACOSX)
-  ,contentsScaleFactor(1.0)
-#endif
 {
   clipRect.top = 0;
   clipRect.left = 0;
diff --git a/dom/plugins/ipc/PluginMessageUtils.h b/dom/plugins/ipc/PluginMessageUtils.h
index a9cd52ae29..e04e906382 100644
--- a/dom/plugins/ipc/PluginMessageUtils.h
+++ b/dom/plugins/ipc/PluginMessageUtils.h
@@ -1,5 +1,4 @@
 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- * vim: sw=4 ts=4 et :
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@@ -23,11 +22,7 @@
 #include "nsTArray.h"
 #include "mozilla/Logging.h"
 #include "nsHashKeys.h"
-#ifdef XP_MACOSX
-#include "PluginInterposeOSX.h"
-#else
 namespace mac_plugin_interposing { class NSCursorInfo { }; }
-#endif
 using mac_plugin_interposing::NSCursorInfo;
 
 namespace mozilla {
@@ -87,24 +82,24 @@ struct NPRemoteWindow
   uint32_t height;
   NPRect clipRect;
   NPWindowType type;
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
   VisualID visualID;
   Colormap colormap;
 #endif /* XP_UNIX */
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
   double contentsScaleFactor;
 #endif
 };
 
-// This struct is like NPAudioDeviceChangeDetails, only it uses a

-// std::wstring instead of a const wchar_t* for the defaultDevice.

-// This gives us the necessary memory-ownership semantics without

-// requiring C++ objects in npapi.h.

-struct NPAudioDeviceChangeDetailsIPC

-{

-  int32_t flow;

-  int32_t role;

-  std::wstring defaultDevice;

+// This struct is like NPAudioDeviceChangeDetails, only it uses a
+// std::wstring instead of a const wchar_t* for the defaultDevice.
+// This gives us the necessary memory-ownership semantics without
+// requiring C++ objects in npapi.h.
+struct NPAudioDeviceChangeDetailsIPC
+{
+  int32_t flow;
+  int32_t role;
+  std::wstring defaultDevice;
 };
 
 #ifdef XP_WIN
@@ -156,11 +151,6 @@ NPPVariableToString(NPPVariable aVar)
   
         VARSTR(NPPVpluginWantsAllNetworkStreams);
 
-#ifdef XP_MACOSX
-        VARSTR(NPPVpluginDrawingModel);
-        VARSTR(NPPVpluginEventModel);
-#endif
-
 #ifdef XP_WIN
         VARSTR(NPPVpluginRequiresAudioDeviceChanges);
 #endif
@@ -357,11 +347,11 @@ struct ParamTraits<mozilla::plugins::NPRemoteWindow>
     WriteParam(aMsg, aParam.height);
     WriteParam(aMsg, aParam.clipRect);
     WriteParam(aMsg, aParam.type);
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     aMsg->WriteULong(aParam.visualID);
     aMsg->WriteULong(aParam.colormap);
 #endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     aMsg->WriteDouble(aParam.contentsScaleFactor);
 #endif
   }
@@ -382,7 +372,7 @@ struct ParamTraits<mozilla::plugins::NPRemoteWindow>
           ReadParam(aMsg, aIter, &type)))
       return false;
 
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     unsigned long visualID;
     unsigned long colormap;
     if (!(aMsg->ReadULong(aIter, &visualID) &&
@@ -390,7 +380,7 @@ struct ParamTraits<mozilla::plugins::NPRemoteWindow>
       return false;
 #endif
 
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     double contentsScaleFactor;
     if (!aMsg->ReadDouble(aIter, &contentsScaleFactor))
       return false;
@@ -403,11 +393,11 @@ struct ParamTraits<mozilla::plugins::NPRemoteWindow>
     aResult->height = height;
     aResult->clipRect = clipRect;
     aResult->type = type;
-#if defined(MOZ_X11) && defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(MOZ_X11) && defined(XP_UNIX)
     aResult->visualID = visualID;
     aResult->colormap = colormap;
 #endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     aResult->contentsScaleFactor = contentsScaleFactor;
 #endif
     return true;
@@ -422,161 +412,6 @@ struct ParamTraits<mozilla::plugins::NPRemoteWindow>
   }
 };
 
-#ifdef XP_MACOSX
-template <>
-struct ParamTraits<NPNSString*>
-{
-  typedef NPNSString* paramType;
-
-  // Empty string writes a length of 0 and no buffer.
-  // We don't write a nullptr terminating character in buffers.
-  static void Write(Message* aMsg, const paramType& aParam)
-  {
-    CFStringRef cfString = (CFStringRef)aParam;
-
-    // Write true if we have a string, false represents nullptr.
-    aMsg->WriteBool(!!cfString);
-    if (!cfString) {
-      return;
-    }
-
-    long length = ::CFStringGetLength(cfString);
-    WriteParam(aMsg, length);
-    if (length == 0) {
-      return;
-    }
-
-    // Attempt to get characters without any allocation/conversion.
-    if (::CFStringGetCharactersPtr(cfString)) {
-      aMsg->WriteBytes(::CFStringGetCharactersPtr(cfString), length * sizeof(UniChar));
-    } else {
-      UniChar *buffer = (UniChar*)moz_xmalloc(length * sizeof(UniChar));
-      ::CFStringGetCharacters(cfString, ::CFRangeMake(0, length), buffer);
-      aMsg->WriteBytes(buffer, length * sizeof(UniChar));
-      free(buffer);
-    }
-  }
-
-  static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
-  {
-    bool haveString = false;
-    if (!aMsg->ReadBool(aIter, &haveString)) {
-      return false;
-    }
-    if (!haveString) {
-      *aResult = nullptr;
-      return true;
-    }
-
-    long length;
-    if (!ReadParam(aMsg, aIter, &length)) {
-      return false;
-    }
-
-    // Avoid integer multiplication overflow.
-    if (length > INT_MAX / static_cast<long>(sizeof(UniChar))) {
-      return false;
-    }
-
-    auto chars = mozilla::MakeUnique<UniChar[]>(length);
-    if (length != 0) {
-      if (!aMsg->ReadBytesInto(aIter, chars.get(), length * sizeof(UniChar))) {
-        return false;
-      }
-    }
-
-    *aResult = (NPNSString*)::CFStringCreateWithBytes(kCFAllocatorDefault, (UInt8*)chars.get(),
-                                                      length * sizeof(UniChar),
-                                                      kCFStringEncodingUTF16, false);
-    if (!*aResult) {
-      return false;
-    }
-
-    return true;
-  }
-};
-#endif
-
-#ifdef XP_MACOSX
-template <>
-struct ParamTraits<NSCursorInfo>
-{
-  typedef NSCursorInfo paramType;
-
-  static void Write(Message* aMsg, const paramType& aParam)
-  {
-    NSCursorInfo::Type type = aParam.GetType();
-
-    aMsg->WriteInt(type);
-
-    nsPoint hotSpot = aParam.GetHotSpot();
-    WriteParam(aMsg, hotSpot.x);
-    WriteParam(aMsg, hotSpot.y);
-
-    uint32_t dataLength = aParam.GetCustomImageDataLength();
-    WriteParam(aMsg, dataLength);
-    if (dataLength == 0) {
-      return;
-    }
-
-    uint8_t* buffer = (uint8_t*)moz_xmalloc(dataLength);
-    memcpy(buffer, aParam.GetCustomImageData(), dataLength);
-    aMsg->WriteBytes(buffer, dataLength);
-    free(buffer);
-  }
-
-  static bool Read(const Message* aMsg, PickleIterator* aIter, paramType* aResult)
-  {
-    NSCursorInfo::Type type;
-    if (!aMsg->ReadInt(aIter, (int*)&type)) {
-      return false;
-    }
-
-    nscoord hotSpotX, hotSpotY;
-    if (!ReadParam(aMsg, aIter, &hotSpotX) ||
-        !ReadParam(aMsg, aIter, &hotSpotY)) {
-      return false;
-    }
-
-    uint32_t dataLength;
-    if (!ReadParam(aMsg, aIter, &dataLength)) {
-      return false;
-    }
-
-    auto data = mozilla::MakeUnique<uint8_t[]>(dataLength);
-    if (dataLength != 0) {
-      if (!aMsg->ReadBytesInto(aIter, data.get(), dataLength)) {
-        return false;
-      }
-    }
-
-    aResult->SetType(type);
-    aResult->SetHotSpot(nsPoint(hotSpotX, hotSpotY));
-    aResult->SetCustomImageData(data.get(), dataLength);
-
-    return true;
-  }
-
-  static void Log(const paramType& aParam, std::wstring* aLog)
-  {
-    const char* typeName = aParam.GetTypeName();
-    nsPoint hotSpot = aParam.GetHotSpot();
-    int hotSpotX, hotSpotY;
-#ifdef NS_COORD_IS_FLOAT
-    hotSpotX = rint(hotSpot.x);
-    hotSpotY = rint(hotSpot.y);
-#else
-    hotSpotX = hotSpot.x;
-    hotSpotY = hotSpot.y;
-#endif
-    uint32_t dataLength = aParam.GetCustomImageDataLength();
-    uint8_t* data = aParam.GetCustomImageData();
-
-    aLog->append(StringPrintf(L"[%s, (%i %i), %u, %p]",
-                              typeName, hotSpotX, hotSpotY, dataLength, data));
-  }
-};
-#else
 template<>
 struct ParamTraits<NSCursorInfo>
 {
@@ -589,7 +424,6 @@ struct ParamTraits<NSCursorInfo>
     return false;
   }
 };
-#endif // #ifdef XP_MACOSX
 
 template <>
 struct ParamTraits<mozilla::plugins::IPCByteRange>
@@ -732,9 +566,7 @@ struct ParamTraits<mozilla::plugins::NPAudioDeviceChangeDetailsIPC>
 // 
 // NB: these guards are based on those where struct NPEvent is defined
 // in npapi.h.  They should be kept in sync.
-#if defined(XP_MACOSX)
-#  include "mozilla/plugins/NPEventOSX.h"
-#elif defined(XP_WIN)
+#if defined(XP_WIN)
 #  include "mozilla/plugins/NPEventWindows.h"
 #elif defined(XP_UNIX)
 #  include "mozilla/plugins/NPEventUnix.h"
diff --git a/dom/plugins/ipc/PluginModuleChild.cpp b/dom/plugins/ipc/PluginModuleChild.cpp
index 1e65345fda..bd13b8d9a4 100644
--- a/dom/plugins/ipc/PluginModuleChild.cpp
+++ b/dom/plugins/ipc/PluginModuleChild.cpp
@@ -132,12 +132,6 @@ PluginModuleChild::PluginModuleChild(bool aIsChrome)
         MOZ_ASSERT(!gChromeInstance);
         gChromeInstance = this;
     }
-
-#ifdef XP_MACOSX
-    if (aIsChrome) {
-      mac_plugin_interposing::child::SetUpCocoaInterposing();
-    }
-#endif
 }
 
 PluginModuleChild::~PluginModuleChild()
@@ -260,14 +254,8 @@ PluginModuleChild::InitForChrome(const std::string& aPluginFilename,
         AddQuirk(QUIRK_FLASH_EXPOSE_COORD_TRANSLATION);
     }
 #endif
-#if defined(XP_MACOSX)
-    const char* namePrefix = "Plugin Content";
-    char nameBuffer[80];
-    SprintfLiteral(nameBuffer, "%s (%s)", namePrefix, info.fName);
-    mozilla::plugins::PluginUtilsOSX::SetProcessName(nameBuffer);
-#endif
     pluginFile.FreePluginInfo(info);
-#if defined(MOZ_X11) || defined(XP_MACOSX)
+#if defined(MOZ_X11)
     if (!mLibrary)
 #endif
     {
diff --git a/dom/plugins/ipc/PluginModuleParent.cpp b/dom/plugins/ipc/PluginModuleParent.cpp
index 6ea205ef0f..f7609bcd5e 100755
--- a/dom/plugins/ipc/PluginModuleParent.cpp
+++ b/dom/plugins/ipc/PluginModuleParent.cpp
@@ -1,5 +1,4 @@
 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- * vim: sw=4 ts=4 et :
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@@ -48,9 +47,6 @@
 
 #ifdef MOZ_WIDGET_GTK
 #include <glib.h>
-#elif XP_MACOSX
-#include "PluginInterposeOSX.h"
-#include "PluginUtilsOSX.h"
 #endif
 
 using base::KillProcess;
@@ -508,7 +504,7 @@ PluginModuleChromeParent::OnProcessLaunched(const bool aSucceeded)
         if (NS_SUCCEEDED(mAsyncInitRv))
 #endif
         {
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
             mAsyncInitRv = NP_Initialize(mNPNIface,
                                          mNPPIface,
                                          &mAsyncInitError);
@@ -517,13 +513,6 @@ PluginModuleChromeParent::OnProcessLaunched(const bool aSucceeded)
                                          &mAsyncInitError);
 #endif
         }
-
-#if defined(XP_MACOSX)
-        if (NS_SUCCEEDED(mAsyncInitRv)) {
-            mAsyncInitRv = NP_GetEntryPoints(mNPPIface,
-                                             &mAsyncInitError);
-        }
-#endif
     }
 }
 
@@ -1668,13 +1657,8 @@ PluginModuleParent::GetSettings(PluginSettings* aSettings)
     aSettings->supportsWindowless() = GetSetting(NPNVSupportsWindowless);
     aSettings->userAgent() = NullableString(mNPNIface->uagent(nullptr));
 
-#if defined(XP_MACOSX)
-    aSettings->nativeCursorsSupported() =
-      Preferences::GetBool("dom.ipc.plugins.nativeCursorSupport", false);
-#else
     // Need to initialize this to satisfy IPDL.
     aSettings->nativeCursorsSupported() = false;
-#endif
 }
 
 void
@@ -1692,7 +1676,7 @@ PluginModuleChromeParent::CachedSettingChanged(const char* aPref, void* aModule)
     module->CachedSettingChanged();
 }
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
 nsresult
 PluginModuleParent::NP_Initialize(NPNetscapeFuncs* bFuncs, NPPluginFuncs* pFuncs, NPError* error)
 {
@@ -1830,7 +1814,7 @@ PluginModuleParent::NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error)
     return NS_OK;
 }
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
 
 nsresult
 PluginModuleContentParent::NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error)
@@ -1853,20 +1837,10 @@ PluginModuleChromeParent::NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error)
     if (NS_FAILED(rv))
         return rv;
 
-#if defined(XP_MACOSX)
-    if (!mSubprocess->IsConnected()) {
-        // The subprocess isn't connected yet. Defer NP_Initialize until
-        // OnProcessLaunched is invoked.
-        mInitOnAsyncConnect = true;
-        *error = NPERR_NO_ERROR;
-        return NS_OK;
-    }
-#else
     if (mInitOnAsyncConnect) {
         *error = NPERR_NO_ERROR;
         return NS_OK;
     }
-#endif
 
     PluginSettings settings;
     GetSettings(&settings);
@@ -2058,7 +2032,7 @@ PluginModuleParent::NP_GetValue(void *future, NPPVariable aVariable,
     return NS_OK;
 }
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
 nsresult
 PluginModuleParent::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
 {
@@ -2067,16 +2041,7 @@ PluginModuleParent::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
     *error = NPERR_NO_ERROR;
     if (mIsStartingAsync && !IsChrome()) {
         mNPPIface = pFuncs;
-#if defined(XP_MACOSX)
-        if (mNPInitialized) {
-            SetPluginFuncs(pFuncs);
-            InitAsyncSurrogates();
-        } else {
-            PluginAsyncSurrogate::NP_GetEntryPoints(pFuncs);
-        }
-#else
         PluginAsyncSurrogate::NP_GetEntryPoints(pFuncs);
-#endif
     } else {
         SetPluginFuncs(pFuncs);
     }
@@ -2087,14 +2052,6 @@ PluginModuleParent::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
 nsresult
 PluginModuleChromeParent::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error)
 {
-#if defined(XP_MACOSX)
-    if (mInitOnAsyncConnect) {
-        PluginAsyncSurrogate::NP_GetEntryPoints(pFuncs);
-        mNPPIface = pFuncs;
-        *error = NPERR_NO_ERROR;
-        return NS_OK;
-    }
-#else
     if (mIsStartingAsync) {
         PluginAsyncSurrogate::NP_GetEntryPoints(pFuncs);
     }
@@ -2104,7 +2061,6 @@ PluginModuleChromeParent::NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* erro
         *error = NPERR_NO_ERROR;
         return NS_OK;
     }
-#endif
 
     // We need to have the plugin process update its function table here by
     // actually calling NP_GetEntryPoints. The parent's function table will
@@ -2325,18 +2281,7 @@ PluginModuleParent::NPP_GetSitesWithData(nsCOMPtr<nsIGetSitesWithDataCallback> c
     return NS_OK;
 }
 
-#if defined(XP_MACOSX)
-nsresult
-PluginModuleParent::IsRemoteDrawingCoreAnimation(NPP instance, bool *aDrawing)
-{
-    PluginInstanceParent* i = PluginInstanceParent::Cast(instance);
-    if (!i)
-        return NS_ERROR_FAILURE;
-
-    return i->IsRemoteDrawingCoreAnimation(aDrawing);
-}
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
 nsresult
 PluginModuleParent::ContentsScaleFactorChanged(NPP instance, double aContentsScaleFactor)
 {
@@ -2346,17 +2291,9 @@ PluginModuleParent::ContentsScaleFactorChanged(NPP instance, double aContentsSca
 
     return i->ContentsScaleFactorChanged(aContentsScaleFactor);
 }
-#endif // #if defined(XP_MACOSX)
-
-#if defined(XP_MACOSX)
-bool
-PluginModuleParent::AnswerProcessSomeEvents()
-{
-    mozilla::plugins::PluginUtilsOSX::InvokeNativeEventLoop();
-    return true;
-}
+#endif // #if defined(XP_WIN)
 
-#elif !defined(MOZ_WIDGET_GTK)
+#if !defined(MOZ_WIDGET_GTK)
 bool
 PluginModuleParent::AnswerProcessSomeEvents()
 {
@@ -2414,85 +2351,54 @@ PluginModuleParent::RecvPluginShowWindow(const uint32_t& aWindowId, const bool&
                                          const size_t& aWidth, const size_t& aHeight)
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
-#if defined(XP_MACOSX)
-    CGRect windowBound = ::CGRectMake(aX, aY, aWidth, aHeight);
-    mac_plugin_interposing::parent::OnPluginShowWindow(aWindowId, windowBound, aModal);
-    return true;
-#else
     NS_NOTREACHED(
         "PluginInstanceParent::RecvPluginShowWindow not implemented!");
     return false;
-#endif
 }
 
 bool
 PluginModuleParent::RecvPluginHideWindow(const uint32_t& aWindowId)
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
-#if defined(XP_MACOSX)
-    mac_plugin_interposing::parent::OnPluginHideWindow(aWindowId, OtherPid());
-    return true;
-#else
     NS_NOTREACHED(
         "PluginInstanceParent::RecvPluginHideWindow not implemented!");
     return false;
-#endif
 }
 
 bool
 PluginModuleParent::RecvSetCursor(const NSCursorInfo& aCursorInfo)
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
-#if defined(XP_MACOSX)
-    mac_plugin_interposing::parent::OnSetCursor(aCursorInfo);
-    return true;
-#else
     NS_NOTREACHED(
         "PluginInstanceParent::RecvSetCursor not implemented!");
     return false;
-#endif
 }
 
 bool
 PluginModuleParent::RecvShowCursor(const bool& aShow)
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
-#if defined(XP_MACOSX)
-    mac_plugin_interposing::parent::OnShowCursor(aShow);
-    return true;
-#else
     NS_NOTREACHED(
         "PluginInstanceParent::RecvShowCursor not implemented!");
     return false;
-#endif
 }
 
 bool
 PluginModuleParent::RecvPushCursor(const NSCursorInfo& aCursorInfo)
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
-#if defined(XP_MACOSX)
-    mac_plugin_interposing::parent::OnPushCursor(aCursorInfo);
-    return true;
-#else
     NS_NOTREACHED(
         "PluginInstanceParent::RecvPushCursor not implemented!");
     return false;
-#endif
 }
 
 bool
 PluginModuleParent::RecvPopCursor()
 {
     PLUGIN_LOG_DEBUG(("%s", FULLFUNCTION));
-#if defined(XP_MACOSX)
-    mac_plugin_interposing::parent::OnPopCursor();
-    return true;
-#else
     NS_NOTREACHED(
         "PluginInstanceParent::RecvPopCursor not implemented!");
     return false;
-#endif
 }
 
 bool
diff --git a/dom/plugins/ipc/PluginModuleParent.h b/dom/plugins/ipc/PluginModuleParent.h
index 909e8fe351..11c2a47c65 100644
--- a/dom/plugins/ipc/PluginModuleParent.h
+++ b/dom/plugins/ipc/PluginModuleParent.h
@@ -247,7 +247,7 @@ protected:
                        const mozilla::NativeEventData& aNativeKeyData,
                        bool aIsConsumed) override;
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
     virtual nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPPluginFuncs* pFuncs, NPError* error) override;
 #else
     virtual nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error) override;
@@ -257,7 +257,7 @@ protected:
     virtual nsresult NP_GetMIMEDescription(const char** mimeDesc) override;
     virtual nsresult NP_GetValue(void *future, NPPVariable aVariable,
                                  void *aValue, NPError* error) override;
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
     virtual nsresult NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error) override;
 #endif
     virtual nsresult NPP_New(NPMIMEType pluginType, NPP instance,
@@ -278,10 +278,7 @@ private:
 
 public:
 
-#if defined(XP_MACOSX)
-    virtual nsresult IsRemoteDrawingCoreAnimation(NPP instance, bool *aDrawing) override;
-#endif
-#if defined(XP_MACOSX) || defined(XP_WIN)
+#if defined(XP_WIN)
     virtual nsresult ContentsScaleFactorChanged(NPP instance, double aContentsScaleFactor) override;
 #endif
 
@@ -355,7 +352,7 @@ class PluginModuleContentParent : public PluginModuleParent
 
     virtual ~PluginModuleContentParent();
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
     nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error) override;
 #endif
 
@@ -479,13 +476,13 @@ private:
     PluginProcessParent* Process() const { return mSubprocess; }
     base::ProcessHandle ChildProcessHandle() { return mSubprocess->GetChildProcessHandle(); }
 
-#if defined(XP_UNIX) && !defined(XP_MACOSX)
+#if defined(XP_UNIX)
     virtual nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPPluginFuncs* pFuncs, NPError* error) override;
 #else
     virtual nsresult NP_Initialize(NPNetscapeFuncs* bFuncs, NPError* error) override;
 #endif
 
-#if defined(XP_WIN) || defined(XP_MACOSX)
+#if defined(XP_WIN)
     virtual nsresult NP_GetEntryPoints(NPPluginFuncs* pFuncs, NPError* error) override;
 #endif
 
diff --git a/dom/plugins/ipc/PluginProcessChild.cpp b/dom/plugins/ipc/PluginProcessChild.cpp
index 32bf062150..9ba0926636 100644
--- a/dom/plugins/ipc/PluginProcessChild.cpp
+++ b/dom/plugins/ipc/PluginProcessChild.cpp
@@ -1,5 +1,4 @@
 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- * vim: sw=4 ts=4 et :
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
@@ -13,13 +12,6 @@
 #include "base/string_util.h"
 #include "nsDebugImpl.h"
 
-#if defined(XP_MACOSX)
-#include "nsCocoaFeatures.h"
-// An undocumented CoreGraphics framework method, present in the same form
-// since at least OS X 10.5.
-extern "C" CGError CGSSetDebugOptions(int options);
-#endif
-
 #ifdef XP_WIN
 bool ShouldProtectPluginCurrentDirectory(char16ptr_t pluginFilePath);
 #endif
@@ -40,42 +32,6 @@ PluginProcessChild::Init()
 {
     nsDebugImpl::SetMultiprocessMode("NPAPI");
 
-#if defined(XP_MACOSX)
-    // Remove the trigger for "dyld interposing" that we added in
-    // GeckoChildProcessHost::PerformAsyncLaunchInternal(), in the host
-    // process just before we were launched.  Dyld interposing will still
-    // happen in our process (the plugin child process).  But we don't want
-    // it to happen in any processes that the plugin might launch from our
-    // process.
-    nsCString interpose(PR_GetEnv("DYLD_INSERT_LIBRARIES"));
-    if (!interpose.IsEmpty()) {
-        // If we added the path to libplugin_child_interpose.dylib to an
-        // existing DYLD_INSERT_LIBRARIES, we appended it to the end, after a
-        // ":" path seperator.
-        int32_t lastSeparatorPos = interpose.RFind(":");
-        int32_t lastTriggerPos = interpose.RFind("libplugin_child_interpose.dylib");
-        bool needsReset = false;
-        if (lastTriggerPos != -1) {
-            if (lastSeparatorPos == -1) {
-                interpose.Truncate();
-                needsReset = true;
-            } else if (lastTriggerPos > lastSeparatorPos) {
-                interpose.SetLength(lastSeparatorPos);
-                needsReset = true;
-            }
-        }
-        if (needsReset) {
-            nsCString setInterpose("DYLD_INSERT_LIBRARIES=");
-            if (!interpose.IsEmpty()) {
-                setInterpose.Append(interpose);
-            }
-            // Values passed to PR_SetEnv() must be seperately allocated.
-            char* setInterposePtr = strdup(setInterpose.get());
-            PR_SetEnv(setInterposePtr);
-        }
-    }
-#endif
-
     // Certain plugins, such as flash, steal the unhandled exception filter
     // thus we never get crash reports when they fault. This call fixes it.
     message_loop()->set_exception_restoration(true);
@@ -115,17 +71,6 @@ PluginProcessChild::Init()
     bool retval = mPlugin.InitForChrome(pluginFilename, ParentPid(),
                                         IOThreadChild::message_loop(),
                                         IOThreadChild::channel());
-#if defined(XP_MACOSX)
-    if (nsCocoaFeatures::OnYosemiteOrLater()) {
-      // Explicitly turn off CGEvent logging.  This works around bug 1092855.
-      // If there are already CGEvents in the log, turning off logging also
-      // causes those events to be written to disk.  But at this point no
-      // CGEvents have yet been processed.  CGEvents are events (usually
-      // input events) pulled from the WindowServer.  An option of 0x80000008
-      // turns on CGEvent logging.
-      CGSSetDebugOptions(0x80000007);
-    }
-#endif
     return retval;
 }
 
diff --git a/dom/plugins/ipc/PluginProcessParent.cpp b/dom/plugins/ipc/PluginProcessParent.cpp
index fb0e182461..b6efcdc64c 100644
--- a/dom/plugins/ipc/PluginProcessParent.cpp
+++ b/dom/plugins/ipc/PluginProcessParent.cpp
@@ -49,13 +49,6 @@ PluginProcessParent::Launch(mozilla::UniquePtr<LaunchCompleteTask> aLaunchComple
     uint32_t containerArchitectures = GetSupportedArchitecturesForProcessType(GeckoProcessType_Plugin);
 
     uint32_t pluginLibArchitectures = currentArchitecture;
-#ifdef XP_MACOSX
-    nsresult rv = GetArchitecturesForBinary(mPluginFilePath.c_str(), &pluginLibArchitectures);
-    if (NS_FAILED(rv)) {
-        // If the call failed just assume that we want the current architecture.
-        pluginLibArchitectures = currentArchitecture;
-    }
-#endif
 
     ProcessArchitecture selectedArchitecture = currentArchitecture;
     if (!(pluginLibArchitectures & containerArchitectures & currentArchitecture)) {
diff --git a/dom/plugins/ipc/PluginQuirks.cpp b/dom/plugins/ipc/PluginQuirks.cpp
index c60cf88362..a8b0f62056 100644
--- a/dom/plugins/ipc/PluginQuirks.cpp
+++ b/dom/plugins/ipc/PluginQuirks.cpp
@@ -49,16 +49,6 @@ int GetQuirksFromMimeTypeAndFilename(const nsCString& aMimeType,
     }
 #endif
 
-#ifdef XP_MACOSX
-    // Whitelist Flash and Quicktime to support offline renderer
-    NS_NAMED_LITERAL_CSTRING(quicktime, "QuickTime Plugin.plugin");
-    if (specialType == nsPluginHost::eSpecialType_Flash) {
-        quirks |= QUIRK_ALLOW_OFFLINE_RENDERER;
-    } else if (FindInReadable(quicktime, aPluginFilename)) {
-        quirks |= QUIRK_ALLOW_OFFLINE_RENDERER;
-    }
-#endif
-
 #ifdef OS_WIN
     if (specialType == nsPluginHost::eSpecialType_Unity) {
         quirks |= QUIRK_UNITY_FIXUP_MOUSE_CAPTURE;
diff --git a/dom/plugins/ipc/PluginUtilsOSX.h b/dom/plugins/ipc/PluginUtilsOSX.h
deleted file mode 100644
index c201782c0f..0000000000
--- a/dom/plugins/ipc/PluginUtilsOSX.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-// vim:set ts=2 sts=2 sw=2 et cin:
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#ifndef dom_plugins_PluginUtilsOSX_h
-#define dom_plugins_PluginUtilsOSX_h 1
-
-#include "npapi.h"
-#include "mozilla/gfx/QuartzSupport.h"
-#include "nsRect.h"
-
-namespace mozilla {
-namespace plugins {
-namespace PluginUtilsOSX {
-
-// Need to call back into the browser's message loop to process event.
-typedef void (*RemoteProcessEvents) (void*);
-
-NPError ShowCocoaContextMenu(void* aMenu, int aX, int aY, void* pluginModule, RemoteProcessEvents remoteEvent);
-
-void InvokeNativeEventLoop();
-
-// Need to call back and send a cocoa draw event to the plugin.
-typedef void (*DrawPluginFunc) (CGContextRef, void*, nsIntRect aUpdateRect);
-
-void* GetCGLayer(DrawPluginFunc aFunc, void* aPluginInstance, double aContentsScaleFactor);
-void ReleaseCGLayer(void* cgLayer);
-void Repaint(void* cgLayer, nsIntRect aRect);
-
-bool SetProcessName(const char* aProcessName);
-
-/*
- * Provides a wrapper around nsCARenderer to manage double buffering
- * without having to unbind nsCARenderer on every surface swaps.
- *
- * The double buffer renderer begins with no initialize surfaces.
- * The buffers can be initialized and cleared individually.
- * Swapping still occurs regardless if the buffers are initialized.
- */
-class nsDoubleBufferCARenderer {
-public:
-  nsDoubleBufferCARenderer() : mCALayer(nullptr), mContentsScaleFactor(1.0) {}
-  // Returns width in "display pixels".  A "display pixel" is the smallest
-  // fully addressable part of a display.  But in HiDPI modes each "display
-  // pixel" corresponds to more than one device pixel.  Multiply display pixels
-  // by mContentsScaleFactor to get device pixels.
-  size_t GetFrontSurfaceWidth();
-  // Returns height in "display pixels".  Multiply by
-  // mContentsScaleFactor to get device pixels.
-  size_t GetFrontSurfaceHeight();
-  double GetFrontSurfaceContentsScaleFactor();
-  // Returns width in "display pixels".  Multiply by
-  // mContentsScaleFactor to get device pixels.
-  size_t GetBackSurfaceWidth();
-  // Returns height in "display pixels".  Multiply by
-  // mContentsScaleFactor to get device pixels.
-  size_t GetBackSurfaceHeight();
-  double GetBackSurfaceContentsScaleFactor();
-  IOSurfaceID GetFrontSurfaceID();
-
-  bool HasBackSurface();
-  bool HasFrontSurface();
-  bool HasCALayer();
-
-  void SetCALayer(void *aCALayer);
-  // aWidth and aHeight are in "display pixels".  Multiply by
-  // aContentsScaleFactor to get device pixels.
-  bool InitFrontSurface(size_t aWidth, size_t aHeight,
-                        double aContentsScaleFactor,
-                        AllowOfflineRendererEnum aAllowOfflineRenderer);
-  void Render();
-  void SwapSurfaces();
-  void ClearFrontSurface();
-  void ClearBackSurface();
-
-  double GetContentsScaleFactor() { return mContentsScaleFactor; }
-
-private:
-  void *mCALayer;
-  RefPtr<nsCARenderer> mCARenderer;
-  RefPtr<MacIOSurface> mFrontSurface;
-  RefPtr<MacIOSurface> mBackSurface;
-  double mContentsScaleFactor;
-};
-
-} // namespace PluginUtilsOSX
-} // namespace plugins
-} // namespace mozilla
-
-#endif //dom_plugins_PluginUtilsOSX_h
diff --git a/dom/plugins/ipc/PluginUtilsOSX.mm b/dom/plugins/ipc/PluginUtilsOSX.mm
deleted file mode 100644
index 2a920f7f61..0000000000
--- a/dom/plugins/ipc/PluginUtilsOSX.mm
+++ /dev/null
@@ -1,462 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-// vim:set ts=2 sts=2 sw=2 et cin:
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include <dlfcn.h>
-#import <AppKit/AppKit.h>
-#import <QuartzCore/QuartzCore.h>
-#include "PluginUtilsOSX.h"
-
-// Remove definitions for try/catch interfering with ObjCException macros.
-#include "nsObjCExceptions.h"
-#include "nsCocoaUtils.h"
-
-#include "nsDebug.h"
-
-#include "mozilla/Sprintf.h"
-
-@interface CALayer (ContentsScale)
-- (double)contentsScale;
-- (void)setContentsScale:(double)scale;
-@end
-
-using namespace mozilla::plugins::PluginUtilsOSX;
-
-@interface CGBridgeLayer : CALayer {
-  DrawPluginFunc mDrawFunc;
-  void* mPluginInstance;
-  nsIntRect mUpdateRect;
-}
-- (void)setDrawFunc:(DrawPluginFunc)aFunc
-     pluginInstance:(void*)aPluginInstance;
-- (void)updateRect:(nsIntRect)aRect;
-
-@end
-
-// CGBitmapContextSetData() is an undocumented function present (with
-// the same signature) since at least OS X 10.5.  As the name suggests,
-// it's used to replace the "data" in a bitmap context that was
-// originally specified in a call to CGBitmapContextCreate() or
-// CGBitmapContextCreateWithData().
-typedef void (*CGBitmapContextSetDataFunc) (CGContextRef c,
-                                            size_t x,
-                                            size_t y,
-                                            size_t width,
-                                            size_t height,
-                                            void* data,
-                                            size_t bitsPerComponent,
-                                            size_t bitsPerPixel,
-                                            size_t bytesPerRow);
-CGBitmapContextSetDataFunc CGBitmapContextSetDataPtr = NULL;
-
-@implementation CGBridgeLayer
-- (void) updateRect:(nsIntRect)aRect
-{
-   mUpdateRect.UnionRect(mUpdateRect, aRect);
-}
-
-- (void) setDrawFunc:(DrawPluginFunc)aFunc
-      pluginInstance:(void*)aPluginInstance
-{
-  mDrawFunc = aFunc;
-  mPluginInstance = aPluginInstance;
-}
-
-- (void)drawInContext:(CGContextRef)aCGContext
-{
-  ::CGContextSaveGState(aCGContext); 
-  ::CGContextTranslateCTM(aCGContext, 0, self.bounds.size.height);
-  ::CGContextScaleCTM(aCGContext, (CGFloat) 1, (CGFloat) -1);
-
-  mUpdateRect = nsIntRect::Truncate(0, 0, self.bounds.size.width, self.bounds.size.height);
-
-  mDrawFunc(aCGContext, mPluginInstance, mUpdateRect);
-
-  ::CGContextRestoreGState(aCGContext);
-
-  mUpdateRect.SetEmpty();
-}
-
-@end
-
-void* mozilla::plugins::PluginUtilsOSX::GetCGLayer(DrawPluginFunc aFunc, 
-                                                   void* aPluginInstance, 
-                                                   double aContentsScaleFactor) {
-  CGBridgeLayer *bridgeLayer = [[CGBridgeLayer alloc] init];
-
-  // We need to make bridgeLayer behave properly when its superlayer changes
-  // size (in nsCARenderer::SetBounds()).
-  bridgeLayer.autoresizingMask = kCALayerWidthSizable | kCALayerHeightSizable;
-  bridgeLayer.needsDisplayOnBoundsChange = YES;
-  NSNull *nullValue = [NSNull null];
-  NSDictionary *actions = [NSDictionary dictionaryWithObjectsAndKeys:
-                             nullValue, @"bounds",
-                             nullValue, @"contents",
-                             nullValue, @"contentsRect",
-                             nullValue, @"position",
-                             nil];
-  [bridgeLayer setStyle:[NSDictionary dictionaryWithObject:actions forKey:@"actions"]];
-
-  // For reasons that aren't clear (perhaps one or more OS bugs), we can only
-  // use full HiDPI resolution here if the tree is built with the 10.7 SDK or
-  // up.  If we build with the 10.6 SDK, changing the contentsScale property
-  // of bridgeLayer (even to the same value) causes it to stop working (go
-  // blank).  This doesn't happen with objects that are members of the CALayer
-  // class (as opposed to one of its subclasses).
-#if defined(MAC_OS_X_VERSION_10_7) && \
-    MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
-  if ([bridgeLayer respondsToSelector:@selector(setContentsScale:)]) {
-    bridgeLayer.contentsScale = aContentsScaleFactor;
-  }
-#endif
-
-  [bridgeLayer setDrawFunc:aFunc
-            pluginInstance:aPluginInstance];
-  return bridgeLayer;
-}
-
-void mozilla::plugins::PluginUtilsOSX::ReleaseCGLayer(void *cgLayer) {
-  CGBridgeLayer *bridgeLayer = (CGBridgeLayer*)cgLayer;
-  [bridgeLayer release];
-}
-
-void mozilla::plugins::PluginUtilsOSX::Repaint(void *caLayer, nsIntRect aRect) {
-  CGBridgeLayer *bridgeLayer = (CGBridgeLayer*)caLayer;
-  [CATransaction begin];
-  [bridgeLayer updateRect:aRect];
-  [bridgeLayer setNeedsDisplay];
-  [bridgeLayer displayIfNeeded];
-  [CATransaction commit];
-}
-
-@interface EventProcessor : NSObject {
-  RemoteProcessEvents   aRemoteEvents;
-  void                 *aPluginModule;
-}
-- (void)setRemoteEvents:(RemoteProcessEvents) remoteEvents pluginModule:(void*) pluginModule;
-- (void)onTick;
-@end
-
-@implementation EventProcessor
-- (void) onTick
-{
-    aRemoteEvents(aPluginModule);
-}
-
-- (void)setRemoteEvents:(RemoteProcessEvents) remoteEvents pluginModule:(void*) pluginModule
-{
-    aRemoteEvents = remoteEvents;
-    aPluginModule = pluginModule;
-}
-@end
-
-#define EVENT_PROCESS_DELAY 0.05 // 50 ms
-
-NPError mozilla::plugins::PluginUtilsOSX::ShowCocoaContextMenu(void* aMenu, int aX, int aY, void* pluginModule, RemoteProcessEvents remoteEvent) 
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-
-  // Set the native cursor to the OS default (an arrow) before displaying the
-  // context menu.  Otherwise (if the plugin has changed the cursor) it may
-  // stay as the plugin has set it -- which means it may be invisible.  We
-  // need to do this because we display the context menu without making the
-  // plugin process the foreground process.  If we did, the cursor would
-  // change to an arrow cursor automatically -- as it does in Chrome.
-  [[NSCursor arrowCursor] set];
-
-  EventProcessor* eventProcessor = nullptr;
-  NSTimer *eventTimer = nullptr;
-  if (pluginModule) {
-    // Create a timer to process browser events while waiting
-    // on the menu. This prevents the browser from hanging
-    // during the lifetime of the menu.
-    eventProcessor = [[EventProcessor alloc] init];
-    [eventProcessor setRemoteEvents:remoteEvent pluginModule:pluginModule];
-    eventTimer = [NSTimer timerWithTimeInterval:EVENT_PROCESS_DELAY
-                                   target:eventProcessor selector:@selector(onTick)
-                                   userInfo:nil repeats:TRUE];
-    // Use NSEventTrackingRunLoopMode otherwise the timer will
-    // not fire during the right click menu.
-    [[NSRunLoop currentRunLoop] addTimer:eventTimer
-                                 forMode:NSEventTrackingRunLoopMode];
-  }
-
-  NSMenu* nsmenu = reinterpret_cast<NSMenu*>(aMenu);
-  NSPoint screen_point = ::NSMakePoint(aX, aY);
-
-  [nsmenu popUpMenuPositioningItem:nil atLocation:screen_point inView:nil];
-
-  if (pluginModule) {
-    [eventTimer invalidate];
-    [eventProcessor release];
-  }
-
-  return NPERR_NO_ERROR;
-
-  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(NPERR_GENERIC_ERROR);
-}
-
-void mozilla::plugins::PluginUtilsOSX::InvokeNativeEventLoop()
-{
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-  ::CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.0, true);
-  NS_OBJC_END_TRY_ABORT_BLOCK;
-}
-
-
-#define UNDOCUMENTED_SESSION_CONSTANT ((int)-2)
-namespace mozilla {
-namespace plugins {
-namespace PluginUtilsOSX {
-  static void *sApplicationASN = NULL;
-  static void *sApplicationInfoItem = NULL;
-} // namespace PluginUtilsOSX
-} // namespace plugins
-} // namespace mozilla
-
-bool mozilla::plugins::PluginUtilsOSX::SetProcessName(const char* aProcessName) {
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
-  nsAutoreleasePool localPool;
-
-  if (!aProcessName || strcmp(aProcessName, "") == 0) {
-    return false;
-  }
-
-  NSString *currentName = [[[NSBundle mainBundle] localizedInfoDictionary]
-                              objectForKey:(NSString *)kCFBundleNameKey];
-
-  char formattedName[1024];
-  SprintfLiteral(formattedName, "%s %s", [currentName UTF8String], aProcessName);
-
-  aProcessName = formattedName;
-
-  // This function is based on Chrome/Webkit's and relies on potentially dangerous SPI.
-  typedef CFTypeRef (*LSGetASNType)();
-  typedef OSStatus (*LSSetInformationItemType)(int, CFTypeRef,
-                                               CFStringRef, 
-                                               CFStringRef,
-                                               CFDictionaryRef*);
-
-  CFBundleRef launchServices = ::CFBundleGetBundleWithIdentifier(
-                                          CFSTR("com.apple.LaunchServices"));
-  if (!launchServices) {
-    NS_WARNING("Failed to set process name: Could not open LaunchServices bundle");
-    return false;
-  }
-
-  if (!sApplicationASN) {
-    sApplicationASN = ::CFBundleGetFunctionPointerForName(launchServices, 
-                                            CFSTR("_LSGetCurrentApplicationASN"));
-  }
-
-  LSGetASNType getASNFunc = reinterpret_cast<LSGetASNType>
-                                          (sApplicationASN);
-
-  if (!sApplicationInfoItem) {
-    sApplicationInfoItem = ::CFBundleGetFunctionPointerForName(launchServices, 
-                                            CFSTR("_LSSetApplicationInformationItem"));
-  }
-
-  LSSetInformationItemType setInformationItemFunc 
-                                          = reinterpret_cast<LSSetInformationItemType>
-                                          (sApplicationInfoItem);
-
-  void * displayNameKeyAddr = ::CFBundleGetDataPointerForName(launchServices,
-                                          CFSTR("_kLSDisplayNameKey"));
-
-  CFStringRef displayNameKey = nil;
-  if (displayNameKeyAddr) {
-    displayNameKey = reinterpret_cast<CFStringRef>(*(CFStringRef*)displayNameKeyAddr);
-  }
-
-  // Rename will fail without this
-  ProcessSerialNumber psn;
-  if (::GetCurrentProcess(&psn) != noErr) {
-    return false;
-  }
-
-  CFTypeRef currentAsn = getASNFunc();
-
-  if (!getASNFunc || !setInformationItemFunc || 
-      !displayNameKey || !currentAsn) {
-    NS_WARNING("Failed to set process name: Accessing launchServices failed");
-    return false;
-  }
-
-  CFStringRef processName = ::CFStringCreateWithCString(nil, 
-                                                        aProcessName, 
-                                                        kCFStringEncodingASCII);
-  if (!processName) {
-    NS_WARNING("Failed to set process name: Could not create CFStringRef");
-    return false;
-  }
-
-  OSErr err = setInformationItemFunc(UNDOCUMENTED_SESSION_CONSTANT, currentAsn,
-                                     displayNameKey, processName,
-                                     nil); // Optional out param
-  ::CFRelease(processName);
-  if (err != noErr) {
-    NS_WARNING("Failed to set process name: LSSetInformationItemType err");
-    return false;
-  }
-
-  return true;
-  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(false);
-}
-
-namespace mozilla {
-namespace plugins {
-namespace PluginUtilsOSX {
-
-size_t nsDoubleBufferCARenderer::GetFrontSurfaceWidth() {
-  if (!HasFrontSurface()) {
-    return 0;
-  }
-
-  return mFrontSurface->GetWidth();
-}
-
-size_t nsDoubleBufferCARenderer::GetFrontSurfaceHeight() {
-  if (!HasFrontSurface()) {
-    return 0;
-  }
-
-  return mFrontSurface->GetHeight();
-}
-
-double nsDoubleBufferCARenderer::GetFrontSurfaceContentsScaleFactor() {
-  if (!HasFrontSurface()) {
-    return 1.0;
-  }
-
-  return mFrontSurface->GetContentsScaleFactor();
-}
-
-size_t nsDoubleBufferCARenderer::GetBackSurfaceWidth() {
-  if (!HasBackSurface()) {
-    return 0;
-  }
-
-  return mBackSurface->GetWidth();
-}
-
-size_t nsDoubleBufferCARenderer::GetBackSurfaceHeight() {
-  if (!HasBackSurface()) {
-    return 0;
-  }
-
-  return mBackSurface->GetHeight();
-}
-
-double nsDoubleBufferCARenderer::GetBackSurfaceContentsScaleFactor() {
-  if (!HasBackSurface()) {
-    return 1.0;
-  }
-
-  return mBackSurface->GetContentsScaleFactor();
-}
-
-IOSurfaceID nsDoubleBufferCARenderer::GetFrontSurfaceID() {
-  if (!HasFrontSurface()) {
-    return 0;
-  }
-
-  return mFrontSurface->GetIOSurfaceID();
-}
-
-bool nsDoubleBufferCARenderer::HasBackSurface() {
-  return !!mBackSurface;
-}
-
-bool nsDoubleBufferCARenderer::HasFrontSurface() {
-  return !!mFrontSurface;
-}
-
-bool nsDoubleBufferCARenderer::HasCALayer() {
-  return !!mCALayer;
-}
-
-void nsDoubleBufferCARenderer::SetCALayer(void *aCALayer) {
-  mCALayer = aCALayer;
-}
-
-bool nsDoubleBufferCARenderer::InitFrontSurface(size_t aWidth, size_t aHeight,
-                                                double aContentsScaleFactor,
-                                                AllowOfflineRendererEnum aAllowOfflineRenderer) {
-  if (!mCALayer) {
-    return false;
-  }
-
-  mContentsScaleFactor = aContentsScaleFactor;
-  mFrontSurface = MacIOSurface::CreateIOSurface(aWidth, aHeight, mContentsScaleFactor);
-  if (!mFrontSurface) {
-    mCARenderer = nullptr;
-    return false;
-  }
-
-  if (!mCARenderer) {
-    mCARenderer = new nsCARenderer();
-    if (!mCARenderer) {
-      mFrontSurface = nullptr;
-      return false;
-    }
-
-    mCARenderer->AttachIOSurface(mFrontSurface);
-
-    nsresult result = mCARenderer->SetupRenderer(mCALayer,
-                        mFrontSurface->GetWidth(),
-                        mFrontSurface->GetHeight(),
-                        mContentsScaleFactor,
-                        aAllowOfflineRenderer);
-
-    if (result != NS_OK) {
-      mCARenderer = nullptr;
-      mFrontSurface = nullptr;
-      return false;
-    }
-  } else {
-    mCARenderer->AttachIOSurface(mFrontSurface);
-  }
-
-  return true;
-}
-
-void nsDoubleBufferCARenderer::Render() {
-  if (!HasFrontSurface() || !mCARenderer) {
-    return;
-  }
-
-  mCARenderer->Render(GetFrontSurfaceWidth(), GetFrontSurfaceHeight(),
-                      mContentsScaleFactor, nullptr);
-}
-
-void nsDoubleBufferCARenderer::SwapSurfaces() {
-  RefPtr<MacIOSurface> prevFrontSurface = mFrontSurface;
-  mFrontSurface = mBackSurface;
-  mBackSurface = prevFrontSurface;
-
-  if (mFrontSurface) {
-    mCARenderer->AttachIOSurface(mFrontSurface);
-  }
-}
-
-void nsDoubleBufferCARenderer::ClearFrontSurface() {
-  mFrontSurface = nullptr;
-  if (!mFrontSurface && !mBackSurface) {
-    mCARenderer = nullptr;
-  }
-}
-
-void nsDoubleBufferCARenderer::ClearBackSurface() {
-  mBackSurface = nullptr;
-  if (!mFrontSurface && !mBackSurface) {
-    mCARenderer = nullptr;
-  }
-}
-
-} // namespace PluginUtilsOSX
-} // namespace plugins
-} // namespace mozilla
-
diff --git a/dom/plugins/ipc/interpose/moz.build b/dom/plugins/ipc/interpose/moz.build
deleted file mode 100644
index 319c325a70..0000000000
--- a/dom/plugins/ipc/interpose/moz.build
+++ /dev/null
@@ -1,12 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-SharedLibrary('plugin_child_interpose')
-
-SOURCES += [ "%s.mm" % (LIBRARY_NAME) ]
-
-OS_LIBS += ['-framework Carbon']
-
-DIST_INSTALL = True
diff --git a/dom/plugins/ipc/interpose/plugin_child_interpose.mm b/dom/plugins/ipc/interpose/plugin_child_interpose.mm
deleted file mode 100644
index 58c39b0a1c..0000000000
--- a/dom/plugins/ipc/interpose/plugin_child_interpose.mm
+++ /dev/null
@@ -1,134 +0,0 @@
-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-// Use "dyld interposing" to hook methods imported from other libraries in the
-// plugin child process.  The basic technique is described at
-// http://books.google.com/books?id=K8vUkpOXhN4C&pg=PA73&lpg=PA73&dq=__interpose&source=bl&ots=OJnnXZYpZC&sig=o7I3lXvoduUi13SrPfOON7o3do4&hl=en&ei=AoehS9brCYGQNrvsmeUM&sa=X&oi=book_result&ct=result&resnum=6&ved=0CBsQ6AEwBQ#v=onepage&q=__interpose&f=false.
-// The idea of doing it for the plugin child process comes from Chromium code,
-// particularly from plugin_carbon_interpose_mac.cc
-// (http://codesearch.google.com/codesearch/p?hl=en#OAMlx_jo-ck/src/chrome/browser/plugin_carbon_interpose_mac.cc&q=nscursor&exact_package=chromium&d=1&l=168)
-// and from PluginProcessHost::Init() in plugin_process_host.cc
-// (http://codesearch.google.com/codesearch/p?hl=en#OAMlx_jo-ck/src/content/browser/plugin_process_host.cc&q=nscursor&exact_package=chromium&d=1&l=222).
-
-// These hooks are needed to make certain OS calls work from the child process
-// (a background process) that would normally only work when called in the
-// parent process (the foreground process).  They allow us to serialize
-// information from the child process to the parent process, so that the same
-// (or equivalent) calls can be made from the parent process.
-
-// This file lives in a seperate module (libplugin_child_interpose.dylib),
-// which will get loaded by the OS before any other modules when the plugin
-// child process is launched (from GeckoChildProcessHost::
-// PerformAsyncLaunchInternal()).  For this reason it shouldn't link in other
-// browser modules when loaded.  Instead it should use dlsym() to load
-// pointers to the methods it wants to call in other modules.
-
-#if !defined(__LP64__)
-
-#include <dlfcn.h>
-#import <Carbon/Carbon.h>
-
-// The header file QuickdrawAPI.h is missing on OS X 10.7 and up (though the
-// QuickDraw APIs defined in it are still present) -- so we need to supply the
-// relevant parts of its contents here.  It's likely that Apple will eventually
-// remove the APIs themselves (probably in OS X 10.8), so we need to make them
-// weak imports, and test for their presence before using them.
-#if !defined(__QUICKDRAWAPI__)
-
-struct Cursor;
-extern "C" void SetCursor(const Cursor * crsr) __attribute__((weak_import));
-
-#endif /* __QUICKDRAWAPI__ */
-
-BOOL (*OnSetThemeCursorPtr) (ThemeCursor) = NULL;
-BOOL (*OnSetCursorPtr) (const Cursor*) = NULL;
-BOOL (*OnHideCursorPtr) () = NULL;
-BOOL (*OnShowCursorPtr) () = NULL;
-
-static BOOL loadXULPtrs()
-{
-  if (!OnSetThemeCursorPtr) {
-    // mac_plugin_interposing_child_OnSetThemeCursor(ThemeCursor cursor) is in
-    // PluginInterposeOSX.mm
-    OnSetThemeCursorPtr = (BOOL(*)(ThemeCursor))
-      dlsym(RTLD_DEFAULT, "mac_plugin_interposing_child_OnSetThemeCursor");
-  }
-  if (!OnSetCursorPtr) {
-    // mac_plugin_interposing_child_OnSetCursor(const Cursor* cursor) is in
-    // PluginInterposeOSX.mm
-    OnSetCursorPtr = (BOOL(*)(const Cursor*))
-      dlsym(RTLD_DEFAULT, "mac_plugin_interposing_child_OnSetCursor");
-  }
-  if (!OnHideCursorPtr) {
-    // mac_plugin_interposing_child_OnHideCursor() is in PluginInterposeOSX.mm
-    OnHideCursorPtr = (BOOL(*)())
-      dlsym(RTLD_DEFAULT, "mac_plugin_interposing_child_OnHideCursor");
-  }
-  if (!OnShowCursorPtr) {
-    // mac_plugin_interposing_child_OnShowCursor() is in PluginInterposeOSX.mm
-    OnShowCursorPtr = (BOOL(*)())
-      dlsym(RTLD_DEFAULT, "mac_plugin_interposing_child_OnShowCursor");
-  }
-  return (OnSetCursorPtr && OnSetThemeCursorPtr && OnHideCursorPtr && OnShowCursorPtr);
-}
-
-static OSStatus MacPluginChildSetThemeCursor(ThemeCursor cursor)
-{
-  if (loadXULPtrs()) {
-    OnSetThemeCursorPtr(cursor);
-  }
-  return ::SetThemeCursor(cursor);
-}
-
-static void MacPluginChildSetCursor(const Cursor* cursor)
-{
-  if (::SetCursor) {
-    if (loadXULPtrs()) {
-      OnSetCursorPtr(cursor);
-    }
-    ::SetCursor(cursor);
-  }
-}
-
-static CGError MacPluginChildCGDisplayHideCursor(CGDirectDisplayID display)
-{
-  if (loadXULPtrs()) {
-    OnHideCursorPtr();
-  }
-  return ::CGDisplayHideCursor(display);
-}
-
-static CGError MacPluginChildCGDisplayShowCursor(CGDirectDisplayID display)
-{
-  if (loadXULPtrs()) {
-    OnShowCursorPtr();
-  }
-  return ::CGDisplayShowCursor(display);
-}
-
-#pragma mark -
-
-struct interpose_substitution {
-  const void* replacement;
-  const void* original;
-};
-
-#define INTERPOSE_FUNCTION(function) \
-    { reinterpret_cast<const void*>(MacPluginChild##function), \
-      reinterpret_cast<const void*>(function) }
-
-__attribute__((used)) static const interpose_substitution substitutions[]
-    __attribute__((section("__DATA, __interpose"))) = {
-  INTERPOSE_FUNCTION(SetThemeCursor),
-  INTERPOSE_FUNCTION(CGDisplayHideCursor),
-  INTERPOSE_FUNCTION(CGDisplayShowCursor),
-  // SetCursor() and other QuickDraw APIs will probably be removed in OS X
-  // 10.8.  But this will make 'SetCursor' NULL, which will just stop the OS
-  // from interposing it (tested using an INTERPOSE_FUNCTION_BROKEN macro
-  // that just sets the second address of each tuple to NULL).
-  INTERPOSE_FUNCTION(SetCursor),
-};
-
-#endif  // !__LP64__
diff --git a/dom/plugins/ipc/moz.build b/dom/plugins/ipc/moz.build
index 9190d19272..00f9a47128 100644
--- a/dom/plugins/ipc/moz.build
+++ b/dom/plugins/ipc/moz.build
@@ -3,9 +3,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
-    DIRS += ['interpose']
-
 EXPORTS.mozilla += [
     'PluginLibrary.h',
 ]
@@ -16,7 +13,6 @@ EXPORTS.mozilla.plugins += [
     'BrowserStreamParent.h',
     'ChildAsyncCall.h',
     'ChildTimer.h',
-    'NPEventOSX.h',
     'NPEventUnix.h',
     'NPEventWindows.h',
     'PluginAsyncSurrogate.h',
@@ -36,7 +32,6 @@ EXPORTS.mozilla.plugins += [
     'PluginScriptableObjectUtils.h',
     'PluginStreamChild.h',
     'PluginStreamParent.h',
-    'PluginUtilsOSX.h',
     'PluginWidgetChild.h',
     'PluginWidgetParent.h',
     'StreamNotifyChild.h',
@@ -58,11 +53,6 @@ if CONFIG['OS_ARCH'] == 'WINNT':
         'hangui',
     ]
 
-if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
-    EXPORTS.mozilla.plugins += [
-        'PluginInterposeOSX.h',
-    ]
-
 SOURCES += [
     'BrowserStreamChild.cpp',
     'BrowserStreamParent.cpp',
@@ -86,12 +76,6 @@ SOURCES += [
     'PluginWidgetParent.cpp',
 ]
 
-if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
-    SOURCES += [
-        'PluginInterposeOSX.mm',
-        'PluginUtilsOSX.mm',
-    ]
-
 if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows':
     SOURCES += [
         'D3D11SurfaceHolder.cpp',
diff --git a/dom/system/OSFileConstants.cpp b/dom/system/OSFileConstants.cpp
index 7fde5824cb..c18d9aa6de 100644
--- a/dom/system/OSFileConstants.cpp
+++ b/dom/system/OSFileConstants.cpp
@@ -29,10 +29,6 @@
 #include <linux/fadvise.h>
 #endif // defined(XP_LINUX)
 
-#if defined(XP_MACOSX)
-#include "copyfile.h"
-#endif // defined(XP_MACOSX)
-
 #if defined(XP_WIN)
 #include <windows.h>
 #include <accctrl.h>
@@ -131,22 +127,6 @@ struct Paths {
   nsString winStartMenuProgsDir;
 #endif // defined(XP_WIN)
 
-#if defined(XP_MACOSX)
-  /**
-   * The user's Library directory.
-   */
-  nsString macUserLibDir;
-  /**
-   * The Application directory, that stores applications installed in the
-   * system.
-   */
-  nsString macLocalApplicationsDir;
-  /**
-   * The user's trash directory.
-   */
-  nsString macTrashDir;
-#endif // defined(XP_MACOSX)
-
   Paths()
   {
     libDir.SetIsVoid(true);
@@ -161,12 +141,6 @@ struct Paths {
     winAppDataDir.SetIsVoid(true);
     winStartMenuProgsDir.SetIsVoid(true);
 #endif // defined(XP_WIN)
-
-#if defined(XP_MACOSX)
-    macUserLibDir.SetIsVoid(true);
-    macLocalApplicationsDir.SetIsVoid(true);
-    macTrashDir.SetIsVoid(true);
-#endif // defined(XP_MACOSX)
   }
 };
 
@@ -311,12 +285,6 @@ nsresult InitOSFileConstants()
   GetPathToSpecialDir(NS_WIN_PROGRAMS_DIR, paths->winStartMenuProgsDir);
 #endif // defined(XP_WIN)
 
-#if defined(XP_MACOSX)
-  GetPathToSpecialDir(NS_MAC_USER_LIB_DIR, paths->macUserLibDir);
-  GetPathToSpecialDir(NS_OSX_LOCAL_APPLICATIONS_DIR, paths->macLocalApplicationsDir);
-  GetPathToSpecialDir(NS_MAC_TRASH_DIR, paths->macTrashDir);
-#endif // defined(XP_MACOSX)
-
   gPaths = paths.forget();
 
   // Get the umask from the system-info service.
@@ -972,20 +940,12 @@ bool DefineOSFileConstants(JSContext *cx, JS::Handle<JSObject*> global)
   // Note that we don't actually provide the full path, only the name of the
   // library, which is sufficient to link to the library using js-ctypes.
 
-#if defined(XP_MACOSX)
-  // Under MacOS X, for some reason, libxul is called simply "XUL",
-  // and we need to provide the full path.
-  nsAutoString libxul;
-  libxul.Append(gPaths->libDir);
-  libxul.AppendLiteral("/XUL");
-#else
-  // On other platforms, libxul is a library "xul" with regular
+  // On all supported platforms, libxul is a library "xul" with regular
   // library prefix/suffix.
   nsAutoString libxul;
   libxul.AppendLiteral(DLL_PREFIX);
   libxul.AppendLiteral("xul");
   libxul.AppendLiteral(DLL_SUFFIX);
-#endif // defined(XP_MACOSX)
 
   if (!SetStringProperty(cx, objPath, "libxul", libxul)) {
     return false;
@@ -1033,20 +993,6 @@ bool DefineOSFileConstants(JSContext *cx, JS::Handle<JSObject*> global)
   }
 #endif // defined(XP_WIN)
 
-#if defined(XP_MACOSX)
-  if (!SetStringProperty(cx, objPath, "macUserLibDir", gPaths->macUserLibDir)) {
-    return false;
-  }
-
-  if (!SetStringProperty(cx, objPath, "macLocalApplicationsDir", gPaths->macLocalApplicationsDir)) {
-    return false;
-  }
-
-  if (!SetStringProperty(cx, objPath, "macTrashDir", gPaths->macTrashDir)) {
-    return false;
-  }
-#endif // defined(XP_MACOSX)
-
   // sqlite3 is always a shared lib
   nsAutoString libsqlite3;
   libsqlite3.AppendLiteral(DLL_PREFIX);
diff --git a/dom/xbl/nsXBLPrototypeHandler.cpp b/dom/xbl/nsXBLPrototypeHandler.cpp
index 963e6835c6..4872a850d7 100644
--- a/dom/xbl/nsXBLPrototypeHandler.cpp
+++ b/dom/xbl/nsXBLPrototypeHandler.cpp
@@ -167,13 +167,8 @@ nsXBLPrototypeHandler::InitAccessKeys()
     return;
   }
 
-  // Compiled-in defaults, in case we can't get the pref --
-  // mac doesn't have menu shortcuts, other platforms use alt.
-#ifdef XP_MACOSX
-  kMenuAccessKey = 0;
-#else
+  // Compiled-in defaults, in case we can't get the pref
   kMenuAccessKey = nsIDOMKeyEvent::DOM_VK_ALT;
-#endif
 
   // Get the menu access key value from prefs, overriding the default:
   kMenuAccessKey =
diff --git a/dom/xul/nsXULElement.cpp b/dom/xul/nsXULElement.cpp
index 2ae03e0b17..93d422d1e9 100644
--- a/dom/xul/nsXULElement.cpp
+++ b/dom/xul/nsXULElement.cpp
@@ -523,18 +523,6 @@ nsXULElement::IsFocusableInternal(int32_t *aTabIndex, bool aWithMouse)
   // elements are not focusable by default
   bool shouldFocus = false;
 
-#ifdef XP_MACOSX
-  // on Mac, mouse interactions only focus the element if it's a list,
-  // or if it's a remote target, since the remote target must handle
-  // the focus.
-  if (aWithMouse &&
-      IsNonList(mNodeInfo) &&
-      !EventStateManager::IsRemoteTarget(this))
-  {
-    return false;
-  }
-#endif
-
   nsCOMPtr<nsIDOMXULControlElement> xulControl = do_QueryObject(this);
   if (xulControl) {
     // a disabled element cannot be focused and is not part of the tab order