I don't have a mac, so I can't troubleshoot it in any way. If you could tell me the specifics, I can try fix it. Which version do you have and when do the problems start?
I know what evil apple did took away best game Experience that relate to 64-bit games. and when I did try to open the game it only tell's me "You don't have a permission to play this game". that's the only thing I know about this new version Mac.