Is there a graphics and/or game engine that runs on both Mac & PC? I've seen Unity and that's a possibility, I'm wondering if there are any other choices.
Ideally I want to port the same C++ game code to both PC & Mac platforms, but let the underlying game/graphics engine take advantage of the appropriate hardware.
edit: I'm looking on the level of Torque, Gamebryo & Unreal. A commercial solution is perfectly acceptable.
Thanks, Chris