One of the reasons is of course the way the os looks and feels. But also some great features like mission control (spaces). For produktivity a pc just isnt as hood as a mac. My old imac only got a dualcore and 4gigs of ram. It still can handle inDesign, photoshop, and illustrator at the same. Even 3D stuff with vray4c4d are no problem. There are quite expensive tho but my boss buys it so who cares