Since updating to lion my mac pro won't stay asleep. It appears to wake at all the times i have ever set it to sleep and wake in the past, even though it is set to no longer sleep or wake in system prefs. I have tried everything and i'm left with trying to locate the power management plist and delete it. I have searched the web (and my OS) and can't find its location - beyond my home library plist which has been deleted time and time again. Any help please?