So what about the argument of the Mac being a small market? My response: Define market. First off, I can develop in a host of languages deployable on any platform. Second, in my tribe, Macs are rampant.
I guess if I really wanted to sell software to people who buy their machines at Wal-Mart, then I'd be all behind Windows or whatever. But as it is, in the circles I run in, Windows is so 1999.