discussions.apple.com/thread.jspa?threadID=1353551&tstart=0#6905819 Re: Dual Quad-core Mac Pro reboots from sleep Posted: Mar 22, 2008 10:51 AM in response to: transplant6 I was in Hawaii and went to an Apple Store to help fix my friends macbook and asked the "Genius " about this issue and after a while of harrasment he told me he had cornered an Apple engineer on this issue and the guy said that the way to temporarily fix the issue was to go into preferences, "Start up ?"and deselect your hard drive, i.E. have no disk selected and it would fix the problem until there is an update. Problem is that you must select either you "Macintosh HD" or "Network disk", anyone know how to deselect both so that neither is selected?