The main problem with this is because mac doesnt support directx it would require the entire program being rewritten, if SE mentioned the possibility of it and didnt come through, it will be because they looked into the idea and thought it wasnt financially viable.

This is because most people have PCs and as people have already said, its not hard to put a second partition on to use windows.

Before anyone says "but they will have had to rewrite it for PS3 compatibility" this will be true but they will have looked into it and thought it was financially viable because most of the japanese players will play on PS3 which will more than cover the cost in the long term