These are only funny if you're familiar with the Mac ad campaigns:
Crash Different. IT'S SO GODDAMN TRUE. But now I'm afraid my computer knows I laughed and is planning its revenge. . .
Mac is gay. Well, as a commenter points out, actually Mac is bi and PC is gay.
You know that somewhere out there, by now, Steve Jobs has read
this. (And that he's thinking, "Hey, at least it's not Pirates of Silicon Valley slash.")