hmm not sure how macs work exactly but maybe you have to pull the whole folder into your app folder? to "install" it? It could also have to do with what OS you're using since it's a 4 year old game. /J
Ah, it may be that it's an older game you're right - I think there is an issue for 32 vs 64 bit games being supported on a Mac. At least that's one possibility.
