Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
At this point there are really only three major contenders on the desktop market; Windows, GNU/Linux and Mac OS X. It is a known fact that Windows still holds the vast majority of the market for reasons which are beyond this article, but pretty much come down to Microsoft's sheer power rather than the quality of their OS. GNU/Linux has recently become ready for the desktop in terms of general usability and user friendliness required by desktop users. Sure there are some glitches, but those aren't anymore the major constraint to its adoption. It is now up to computer vendors and major marketing. Mac OS X is a curious one though. Unlike Windows and GNU/Linux, Mac OS X is tied to computers made only by one manufacturer: Apple. If you run Mac OS X you ought to be running an Apple computer. It is in fact easier to run some other operating system on Apple computers than it is to run Mac OS X on other type of computers.
Now consider GNU/Linux. It is the total opposite of Mac OS X in this regard. While Mac OS X will run only on Apple machines, GNU/Linux runs pretty much on everything it touches.