1. There are Linux distributions which are completely free, look far better than OS X, boot faster, and are completely open. However, they tend to lack the die-hard following that comes with Apple devices and systems, and so rarely come up in these arguments. 2. Very (very, very, very) few games on Steam have a Mac version. I tend to steer away from these arguments because they are pointless and amount to religious arguments where no side ever wins, but I had to bring up these two facts here.