How can I tell if a game will run on my machine?

I just bought my first 13" MacBook Pro. Before purchasing new games for my Windows notebook, I used to check the compatibility with [Can You Run It](http://www.systemrequirementslab.com/) , but that site doesn't list Mac compatibility or requirements. Is there any other website where I can check game compatibility for Mac computers? Specifically, I'd like to play Call of Duty 4 and Civilization V. Can I play these games on my 13" MacBook Pro? **Edit:** my system's specification Software Mac OS X Lion 10.7.3 (11D50b) Graphics Intel HD Graphics 3000 384 MB Memory 4 GB 1333 MHz DDR3 Processor 2.7 GHz Intel Core i7 13-inch, Early 2011 with these specifications can i play any of these game on my system?