"Obsolete" is too strong a word, I think. OSX isn't an evolution of the Macintosh's operating system; That'd be Pink, which was even mentioned, and it crashed and burned. OSX was far closer to a Linux box and a Mac box on the same desk, therefore the only change really needed is to replace mentions of Unix or specifically Linux with Linux/OSX as far as the points of the piece are concerned. If Jobs had paid Torvalds to call OSX "Apple Linux" (Or maybe just called it Apple Berkeley Unix) for some reason this would be moot.
I also primarily use Windows and don't have a dog in the fight you mentioned. I might actually dislike Linux more than OSX, though it has been quite a while since I've seriously used the one-button OS.
I also primarily use Windows and don't have a dog in the fight you mentioned. I might actually dislike Linux more than OSX, though it has been quite a while since I've seriously used the one-button OS.