This might be an age old question but do read the answer below. It is because people need computers for different purposes. In a large corporation with 100′000 employees attached to a corporate network, you simply can’t hook everyone up with Macs, They aren’t designed for that sort of scale and they lack the huge variety of admin tools for managing the networks, mass deployment of software, etc. So it’s Windows. Period. If you work in a design agency with a dozen people and you like sparkly things, then you’ll be happy with a Mac. You’re paying up to twice the amount of money for the same amount of storage space and processing power (or more if you have a Mac (not book) Pro. But all our design agency partners use Macs, because they are so accustomed to Adobe products running great on Mac. Nowadays, they run just as well under Windows. I work about 50% on Mac and 50% on Windows. I actually enjoy working in both environments, but could honestly kick Microsof...