samuelgames said:
Download 1964 source... and complie with you c++ compliator...
If only it were that simple!
The 1964 source is only available for version 0.8.5, and even then it's for Windows. (The 0.9.9 being binary-only probably breaks some arcane SourceForge law, but I don't think too many people care about that... or else you'd have seen a project takeover on SF and someone else working on it...).
You'd definitely have to do quite a bit of coding for it to run on a Mac... if you could do it. Probably be better off writing your own emulator, or helping to get Mupen64 up to speed. Or better yet, write a graphics plugin for mupen64 that supports texture packs (porting RiceVideo 6.1.1 isn't really out of the question). Truth is, the next-gen emulation world could use some emulators that are both open-source and run like normal open-source projects; until then, mupen is really your best bet for anything Mac (except SixtyForce will probably make an Intel release soon enough).