running an OpenGL based 3D modeller in an emulation like Parallels or VMware is never a good idea, at least performance wise...
...don't underestimate the hardware requirements of SU, it's not a paint or office but a CAx application and thus simply needs performance-oriented and compatbile hardware.
Running SU with e.g. shared graphics "accelerators" like the Intel GMA series or gaming cards like the ATI Radeon series (under Win) is surely no good idea and will result in the known and regularly claimed display output glitches.
hth,
Norbert