I think supporting a different platform adds a lot of burden in the development of a GUI heavy tool.
Also Mac (or actually Apple) are very restrictive on HOW to make and distribute apps for their Operating Systems, and things like giving up support for OpenGL in the near future, having to code sign your apps (paying for a certificate), using XCode and building on a Mac (not being able to cross-compile at all) make this a bigger challenge that it’s actually worth.
If people can run this app through Wine, I’d say that they should do that instead.
Anyway that’s my opinion as a developer, just wanted to state it, because this statements and successive requests (after rxi said there were no plans to support Mac) make for unnecessary pressure to any developer.