1) Call of Duty 4: Modern Warfare
With Modern Warfare 2 coming soon to PC and consoles but probably not the Mac, Apple user will be sulking away. Fortunately, Call of Duty 4: Modern Warfare is available for the Mac now! This game-of-the-year titanic FPS game is a must-have for every gamer. Its intense campagin mode and realism will blow your mind away.
2) Blizzard's Warcraft, WOW and Starcraft
Blizzard should be loved by Mac users. Almost all of its popular games such as Warcraft III, Starcraft and World of Warcraft are playable on the Mac. Do take note that the up and coming Starcraft II and Diablo IV are all playable on the Mac! Awesome!
3) The Sims 3
The grand daddy of all human simulations game. With greater graphics and realsim, this is a must-have for all The Sims gamers and Mac users. Have fun making music videos or spoof videos since it is so easy to use its video recoreding function. This is the best The Sims game ever, and there is no reason your Mac didn't have this.
Fable is one of the coolest game on the Xbox, and it has been finally ported to Mac. Fable's trademark feature is the ability for the hero to become good or evil gradually. This alilgment feature is sort of the theme of the whole game. Your every actions will determine the final outcome of your hero. A unique RPG game indeed.
5) Need for Speed Carbon
There aren't many racing game on the Mac, so this game is great addition to your Mac. With a theme of street racing and turf, be prepared to race down the night streets and canyon. This game involve alot of drifting, so be prepared to have a steep learning curve when you are playing. But other than that, a great racing game for the Mac!