Okay, I probably could do the PC over Mac benefits too, they go either way.
I won't give you the built in camera etc. crap, because my PC came with a digital camera (some laptops have them built in) and my computer came with a video and a photo editor.
-Mac OS X comes with a lot of ready software, including XCode, with Windows, you can either download DevC++ or something similar for the C++ abilities, but to have a whole software creating suite, you'd need Visual Studio (Although 2005 Express is now free to download) or a Borland Suite. And XCode isn't as ram hungry as Visual Studio.
With the built in software, there are people that prefer getting a computer with everything they need right there with out having to purchase or download extra software.
-Mac OS X offers more performance than Windows XP, I know, I've compared my system without any malware on it to a similar spec G4 Emac, the Emac didn't lag and ran quite smoothly with all of the fancy stuff still on. Programs loaded quicker, games ran without lag and my PC has the better graphics card. A good use of the ram is essential for some users, like graphics artists or 3D animators.
-No need to install drivers
-Mac OS X is no where near as prone to viruses etc. as Windows, although there have been Viruses for Macs, don't get me wrong on that one.
-The interface and navigation actually appeals to some people more than others
-Apple Macs are now intel based, with bootcamp, which means you can install a fully compatible version of Windows, to get the best of both Windows and MacOS, where you need it.
As I am not a regular Mac user, I cannot offer all of the advantages, because for me, I prefer the advantages of Windows and PC's, for example, one being the price. There are disadvantages for using and Mac and disadvantages of using PC as well as advantages.
If there weren't any advantages of using a Mac over a PC, then people would just use PCs and if PC didn't have any advantages over Macs then people would just use Macs, but the fact is, people use both.
Which is why I hate people going around saying 'Macs are crap, buy a PC' or 'PC's are crap buy a mac'. I'd rather hear some real advice, like 'You want to develop multiplatform games, I'd recommend you pick up a mac with Xcode and grab irrlicht or torque and you can do that', or 'you want to make games, and you're a beginner, grab a PC and Dark Basic'.
Did The Buddha have a Zen micro?