Mac users are people who just want to be able to sit down at the computer and actually start using it. Windows users have to invest a lot of time in security and maintenance to make that happen, while Linux fans seldom actually get to use the computer at all - as soon as they get enough device drivers downloaded off obscure Russian hacker sites to make their system bootable, they're off chasing the next distro de jour.
I think the main thing is, Unix makes Windows seem like a Mac. I like to play games. I considered buying a Mac a few years ago when Jobs promised more support for developers but it was just another empty promise.
Now that Mac's are pretty much PC's, PC's don't really support games so maybe it's time to buy a chess board. I wonder what OS those run under these days. I really, really hope it's not UNIX. Battle Chess was pretty fun but that was DOS.