It's an Amiga
The same argument can be used for the Amiga, which ironically, is still being sold. AmigaOS 3.9 is the latest OS release and 4.0 isn't that far away.
It isn't made by Microsoft, and it isn't Windows. It has a nice GUI, and a stable OS. The Amiga One/AmigaDE is migration to the PowerPC platform.
It can run PC programs via emulators if need be, just like a Macintosh.
it doesn't have any big egos behind it, like Apple has Jobs, but it is a nice little system that could.
I still do not see a reason why I should switch to OSX, but I would like to try it someday and see what all the fuss is about.
"In order to completely solve a problem, you must make sure that the root of the problem is completely removed! If you leave the root, the problem will come back later to get you." - Norman King