After downloading Parallels 6.0 v 12092 and Mac OS V10.8 windowed mode will not display. Coherence, full screen, and modaility work ok. If I cycle to modality, then return to windowed mode, the display screen will show, but no buttons, icons, etc. will work. FYI, I am using a new 2011 Imac -- 2.5gb processor 4 gb memory.