I also tried compiling using this guide and got no where, though I didn't have much time to try and figure out where it went wrong. I installed scons using Homebrew so this might have caused some problems with environment variables. The very first error that cause the compilation to fail was:
In file included from game/../idlib/precompiled.h:135,
from game/precompiled_game.h:28:
game/../idlib/../renderer/qgl.h:47:16: error: gl.h: No such file or directory
In file included from game/../idlib/../renderer/qgl.h:58,
from game/../idlib/precompiled.h:135,
from game/precompiled_game.h:28:
and then a slew of errors after that. I'm not sure what the flag MACOSX_TARGET_ARCH="i386" is supposed to do. I could not find a reference to it in the SConstruct file, though I admit I dont know much about scons. Anyways, I'd like to help in the work of getting a Mac build of the game. My specs are: Model Identifier: MacBookPro3,1 Processor 2.4 GHz Intel Core 2 Duo Memory 6 GB 667 MHz DDR2 SDRAM Graphics NVIDIA GeForce 8600M GT 256 MB Software OS X 10.8.5 (12F37)