My original post was really asking, if a "studio" decided they wanted everyone to use Apple Mac’s as their development platform, what issues are they likely to face.
At the moment, I’m working in C++/DirectX for Windows and hopefully XBLA, and was looking for input on how much of a mission it would be to get a similar tool-chain like Visual Studio/DirectX up and running on a MAC.
The target platform would be PC/DirectX, the development platform could be MAC.
Also, the idea of developing iPhone apps has been raised a few times.
Anyway, thanks for the input, and yeah, I forgot Ogre3D (and similar) is cross-platform (Torque also…), so its not impossible.
I’d still prefer to stay with XP, VS and DX, as it works.