Because Aleph One Macintosh has broken network code, it is impossible for M1A1 netgames to be played on the Mac. Using this patch on a valid copy of Marathon Infinity will modify it for use with M1A1 data files. After patching Marathon Infinity will be sufficient to play the game, but some details will differ.
Only one major bug that I'm aware of: Hulk slap often crashes the machine. Beware the Hulk!
A near-complete conversion of Forge to M1A1 (only compatible with Forge 1.0.3 and 1.0.4, unpatched except possibly Forge A1 patch)
A ResCompare patch for Forge 1.0.3 and 1.0.4 that modifies them to save maps with the creator type 26.A rather than 26.?.