I have this same exact problem. My Mac Pro always went to sleep fine, and i changed the setting once so it wouldnt sleep at all, and now after i change it back to about 10min, it never wants to sleep...regardless of what i change it to. Anyone know how to fix this?
Dave, I have researched this through several forums and in Apple Support and you are the first to describe exactly the actions that have caused my MBP to not automatically go to sleep. Interestingly, I have moved the settings and it will sometimes go to sleep on its own Have you had any luck with the issue? The Apple Support forums are saying it could be Parallels, the PMC? may need resetting, etc, but I have not found a definitive answer. - Matt