I've installed UG NX3 under Parallels Desktop 3.0 Build 4560 using the configuration required by General Motors. After turning off DirectX emulation (the Java-based launcher used by the GM toolkit refused to display itself properly), I was able to start NX3 and work in it. I see that there's a claim that CATIA v5R16 has been tested. OpenGL emulation is critical in order for these higher end CAD programs to perform to a point where they can actually be usable. I tested NX3 under Fusion and it was not usable at all -- try selecting a surface or solid in 3D modelling and you'll notice that Fusion's lack of OpenGL emulation will keep you waiting.... for a LONG time. Be aware that I've only done limited testing with NX3, so it may or may not work for you.
