__Compile gcc for maxosx __Grab and unpack the tar ball $ mkdir ~/tmp && cd ~/tmp $ curl -O http://opensource.apple.com/tarballs/gcc/gcc-5666.3.tar.gz $ tar zxf gcc-5666.3.tar.gz $ cd gcc-5666.3 $ mkdir -p build/obj build/dst build/sym And then build it. You should go make a cup of tea or five whilst this runs. $ gnumake install RC_OS=macos RC_ARCHS=‘i386 x86_64’ TARGETS=‘i386 x86_64’ SRCROOT=pwd OBJROOT=pwd/build/obj DSTROOT=pwd/build/dst SYMROOT=pwd/build/sym And finally install it $ sudo ditto build/dst /