Building ioquake3 on Mac
From ioquake3 wiki
Snow Leopard - Mac OS X 10.6.2
NOTE: These instructions apply to the SVN version.
- Install [Subversion].
- Check out the source from svn://svn.icculus.org/quake3/trunk with "svn co svn://svn.icculus.org/quake3/trunk ioquake3"
- Change to the ioquake3 directory
- run CC=gcc-4.0 ./make-macosx-ub.sh