Dude, you can't think of any mac specific game worth more than 15 minutes? Sorry man, but you just slapped Ambrosia in the face!
I mean, let me list some:
First of all, the Marathon trilogy.
Secondly, Myst.
And lastly, for some more recent examples, anything from Ambrosia (including Mac specific titles like Redline)
Way I see it is big corporations want to sell the most games, so they port to Windows first. Also, look what happened to Bungie after it was bought out by MS: not Mac specific anymore, eh?
These games are EPIC. Pay them some respect man

No hard feelings though
