Install Packages on OS X 10.8
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We assume that you are using [homebrew][homebrew], "The missing package manager for OS X".

[homebrew]: http://brew.sh

Instructions for installing gperftools on OS X 10.8

    $ brew install gperftools

Instructions for installing gcc-4.8 (C++11 compatible) on OS X 10.8

    $ brew tap homebrew/versions
    $ brew install gcc48

Instructions for installing clang-3.3 (C++11 compatible) on OS X 10.8

    $ brew install llvm --with-clang --with-asan