I do graphic design in a print shop. I have to deal with Mac's on a daily basis at my work and they are simply and utterly awful. There are so many issues with them and software/hardware compatibility that it's not even funny. We have nothing but issues when printing from Mac's and their temperamental software ports.
Most people that own them are pretentious scenesters (at least where I live). A good chunk of them only buy Mac's to fit an image. A good chunk of that chunk don't know how to use them. I deal with it on a daily basis and everyone I work with cringe at Mac users.