im working on a macbook, there are several options, but all of them require you to run/emulate windows.

I found bootcamp the best like slacer said.
Besides that, in mac there's a nice emulator called parallels (costs about 60 euro).

VMWare would work too, but didnt test that myself.

but there's obviously no way to make an executable that runs on mac, all windows only (As said, due to DirectX).

regards,