I don't think there is much, if at all any, Software Development Kits for Game Creation for the MAC ( unless u install windows on it :p).
I have been able to find:
(this one lists torque as one you can use, but through personal experience it is 99% incompatible with the major 3D packages, due to the file formats it uses internally. Try it if you will, but I ended up more stressed that any one person should be
These were to top ones I found, but tbh. most games development are done on PC with assets created on MAC and PC as the mb/ma files will work any of the PC, MAC and Linux platforms.
Chris (formerly R@nSiD)
When the power of love overcomes the love of power the world will truely know peace - Jimmy Hendrix
Winner SM VFX Challenge 1
3rd Place SM SteamPunk Challenge (May 2007)