Well my beautiful wife will buy six Mac Cosmetics products some months, outnumbering the total amount of Apple products purchased by our household ever (a total which includes 0 Macs). So it makes some sense to me that more people searching "mac" are looking for the cosmetics, which they research, review, and buy regularly, especially if a portion of Apple searchers are also using more specific terms like "macbook" or "air".
SPYWorld result. What did you just tell us about yourself? :)
Edit: I see it too, seems they have invested lots in SEO.
And: where did the [ Normal | SPYWorld ] buttons go? When Google started SPYWorld it was possible to switch between normal and spyworld searches. I don't see the buttons anymore in my search results. :-o
Off topic: I've noticed that recently, Google's first result for 'Mac' has (mysteriously) changed from "apple.com/mac" to "maccosmetics.com"!