Apple bought OS X too.
I'm arguing that both were massive undertakings by both parties. My OS X example was tainted with sarcasm if you didn't catch the little

there.
Both OS X and Chrome OS (and Android, and iOS) borrow heavily from others, either through acquisitions or from the open source community. To claim Google is any inferior here is just trying to stir the pot, especially calling the poster Troll, that is just insulting and uncalled for.
Both companies deserve props from providing the software they do, neither deserves scorn that some posters here like to dish out.
So what ? OS X is Mach/XNU, Apple didn't make that. It's also a GNU/Berkeley userland, Apple didn't make that either. Again guys, drop the non-sense competition, this thread is about a release of OS X, not some type of Google bashing contest.