I didn't realize just how weak the Mac APIs were for building actual applications until I tried writing one. You NEED a framework like PowerPlant in order to contend with the very primitive primitives Apple supplied. And even then, you don't get nice things like preemptive MT.
I'm an Apple guy now but I will never get used to a one button mouse - it's too retarded, especially when one comes from UNIX where three buttons are simply phenomenally super awesomely useful: I love the mark with the mouse and paste with the middle mouse button - it's the best. I cannot figure out why others haven't implemented that - it's so natural and intuitive - I love that I don't have to explicitly cut and paste - marking is enough.