"Still, in his talk Thursday, Torvalds didn't pull many punches.
"I never much liked Macs. All the interesting stuff is hidden away," he said, adding that he does like Apple hardware. Mac OS X is built on an open-source foundation--the Mach "microkernel" in combination with FreeBSD Unix--but Apple still keeps much secret about OS X's inner workings.
"They made the base of the house open-source, but all the rest of the stuff, the wiring, is their own stuff. I don't want that to happen with Linux," Torvalds said. Mac OS X "doesn't give me the warm-and-fuzzies. I actually dislike Mach a lot. I think they made a lot of bad design choices." "

I am starting to dislike Linus.

Torvalds: Next Linux due by June (and comments about OSX)