I use my iMac for gaming, it runs Crysis at just under 30fps with all the settings maxed out, but it's not the best gaming PC in Apple's lineup. The Mac Pro has far more CPU power and ram than any game today needs and it's cards are upgradeable. If you have the money, and room in your home, a Mac Pro is a far better gaming machine that will be able to run games at max settings for years to come.