Size of market is important, I'll grant you that. But don't underestimate the importance of good programming tools and ease of programming. People develop lots of cool stuff for Windows machines because there's so many of them out there, and there are many good compilers, from expensive professional ones to inexpensive ones like Borland, to free stuff like gnu MingW and CygWin (and the free Borland one, too). "Tinkerers" are more likely to be PC owners than Mac owners. People develop lots of cool stuff for the UNIX workstation market (which is even smaller than the Mac market). UNIX workstations (including Linux boxes) are easy to program, and have tons of tools, including good free compilers for just about every computer language known to man. And they're often availiable in colleges for graduate and doctorial research. There's a "trickle down" effect. People port UNIX programs to Windows to get a bigger market. They usually don't port from UNIX to Mac, because porting to Windows is much less work and gets you into a much larger market. The Mac is (in general) living hell to program. Tools are expensive and scares. The debugging enviroment is horrible. There's only one serious, professional quality Mac compiler, and Motorola bought the company that wrote it (supposedly because they were going to shift to the Windows market) to keep the PowerPC from being a development tool orphan. I'm working in wxWindows lately, which gives me Windows and Linux from the same sourcecode, and Mac too, if I can get at a machine with a compiler. If I can produce a Mac version nearly free, it would be worth doing.