Like Pizoisoned pointed out, Macs can't effectively compete with PCs in terms of compatibility, availability, and ease of use. Macs have always been marked up to utilized their own software and hardware specs, and they're heavily marketed to be slick and appealing, whereas PCs never had that real marketing, except for cases of independent manufacturers. Only recently have PCs been marketed more, and not to mention Macs are starting to conform a little bit to PC specs, with the most recent being the processor type, but it's still a long ways to go before you'll see any sort of games compatibility and availability on a Mac unless Apple changes their game.
I had always equated a Mac for those that want to get into computers, as it offers usually an easier learning curve, whereas if you're really into computer and want to get the most out of your machine, then a PC is the way to go. Macs also have been somewhat more prohibitively expensive whereas a PC setup was usually more cheaper to put together. And if you're a gamer, then you should just get a PC.
Unless you're into old school WarCraft, WoW itself, or some of the Valve games ported over through Steam, you'll have to Bootcamp it. But why bother when you can build a more powerful PC rig for little more than half the cost of a Mac?
Drop you like a needle on the record, scratch my itch.
Watch you walk in circles, hit the beat.
-tries to think of the last Mac build that he saw- nope cant think of one. I'm sorry but when you have no customization to your computer really and you cant upgrade your computer to the level that you can a PC then you just cant compete sorry.