It's good to know they're working on a fix as of just 6 days ago!
D2 just takes up too much resources running in parallels, and LoD is kinda broken gfx wise (menus render so badly as to be unusable) as well. Anybody tried it with vmware fusion? It would be just fine running on an imac or mac pro, but on a mac laptop you can't just let your cpu run at 70+ for hours on end.
I run LoD in Fusion every day, mostly just to load mules up with ITAMZ. It is important that you use the Direct Draw option and not Direct 3D if you actually want to play without graphical glitches.