Yeah, UT3 (or whatever they call it now that it has DX11) is newer though. Who knows. Singleplayer is the game, multiplayer is a fun extension of the game. Apparently, all you have to do to export the game for mac is change a few settings on frontend. Therefore, since it will not take more than a day to finalize and test it, there is absolutely no reason that they should not have a mac version (For singleplayer I agree that multiplayer might be a bit of an issue).