Even with vmware and parallels make one hour of render to six hours or more. Though it supports 3d stuff. i tried maya on vmware. it took so so long to finish. though i am not a 3d enthusiast.
but if you are going for Mac pro, with chunks and chunks of ram. you might be able to speed up a bit more.

if you persist a mac, use boot camp instead, it doesnt worth your money to buy virtualization software to run 3d stuff.

i almost hang myself when i tried to play non-3d-intense game, i am so dead then.