It's the bandwagon effect. There, I said it. I think we can expect this sort of negative infosec press a lot from now on.
I'm not saying they're great at security; in fact, obscurity has been historically one of the main reasons macs are more secure than PCs. If Apple doesn't do something about its underdog-style infrastructure, it'll simply continue to get beaten up like Microsoft was. As Sun Tzu would say, that's the tao.