Well, nice find.
Well, Mac isn't a PC for gaming.
For they who buy Mac's are most artist/designers/animators/video and so on.
So mac's ain't for gaming, they are for creating art to say it like that.
So why buy a Mac if your going to use it for games?
Well, not everyone is so lucky to have both or just be pleased with PC. (Windows)
But sure thing, your your mac can run Mw2, good for you, but I just say:
Not all mac's is compatible to run Mw2!
Because their not meant to play on, but create things.