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+## Disclaimer
+
+OSX builds have "best effort" support, i.e. build might not work at all, some
+tests may fail and some sub-projects are excluded from build.
+
+This manual outlines OSX specific setup. For general building and testing
+instructions see "[README](README.md)" and
+"[Building and Testing changes](doc/building_and_testing.md)".
+
+[Homebrew](https://brew.sh/) is a popular package manager. JPEG XL library and
+binaries could be installed using it:
+
+```bash
+brew install jpeg-xl
+```
+
+## Dependencies
+
+Make sure that `brew doctor` does not report serious problems and up-to-date
+version of XCode is installed.
+
+Installing (actually, building) `clang` might take a couple hours.
+
+```bash
+brew install llvm
+```
+
+```bash
+brew install coreutils cmake giflib jpeg-turbo libpng ninja zlib
+```
+
+Before building the project check that `which clang` is
+`/usr/local/opt/llvm/bin/clang`, not the one provided by XCode. If not, update
+`PATH` environment variable.
+
+Also, setting `CMAKE_PREFIX_PATH` might be necessary for correct include paths
+resolving, e.g.:
+
+```bash
+export CMAKE_PREFIX_PATH=`brew --prefix giflib`:`brew --prefix jpeg-turbo`:`brew --prefix libpng`:`brew --prefix zlib`
+```
+\ No newline at end of file