Hi guys, this is my first post about IVAN in like 5 years, but yes, I'm the same lenox who originally began porting IVAN to Mac. I wanted to reiterate what someone earlier in the thread suggested, that using DosBox with the DOS version of IVAN 0.50 works pretty well. It's not as smooth as the Mac SDL port, but at least it works. Also, the latest versions of Boxer (a Mac DosBox frontend) are AMAZING in general.
That said, the main problem getting IVAN to work on Mac was the difference in PowerPC and x86 architecture. Now that Macs are x86, it is a moot point. The game was in a playable state but would crash in certain areas because of the architecture differences. So, something tells me I could get IVAN compiled without too much fuss on Intel Macs if there was enough interest. The only problem I foresee are GCC 4 and 64-bit but they can be worked around.
Does anyone still care enough to have a native Mac OS (Intel-only) version?