and woah on there, settle down dude. Most Mac users, like me, buy a diffrent mouse, I wish Apple had a multi button mouse, simply, they don't. If I were to advise people on buying a mouse, I'd almost certainly tell people to get a MS mouse (with logitech close behind). OSX (as with previous Mac OS's supported multi button mice out of the box, plug it in, it works.
No need for Apple, again I believe you underestimate Apple, it was Apple who first worked out the GUI was the was to go (firstly developed by Xerox), then later ripped off by MS (sorry, I couldn't help myself), Apple were the ones that shwoed the music execs that music on the internet can work, it just needed to be done properly. Apple was recently announced as the innovator of the last 30 years (
http://www.computing.co.uk/news/1144441), Apple played a massive roll in the early development of Aldus (now knows of course as Adobe) Photoshop, Apple recignised that things like movie editing, etc has a place for home users, Apple work the first company with a successful computer in the world. I'm sure theres more, Apple are an innovator. The reasons for Apples massive failure is almost certainly linked to a previous CEO's decision, to Allow MS to develop a MacOS like product for PC's, in return, MS would develop Word, ect, for Macs. After a few years when this agreement rean out, and MS and Apple basicly didn't want to renue the agreement, MS just continued on developing and selling windows, Apple tried to sue, they failed. That was the mistake, letting MS develop windows, if they were to do that again, the very least they'd do would be to develop windows themselves, and allow MS no control over it, then again, is Jobs had his way, not even that.