This is a well documented bug for SP 1.8Ghz G5 Tower (600mhzFSB). Apple recommends you do not allow your mac to sleep. That is a round about way of saying this mac can't sleep. There are several other things this machine can't do either. You might want to check this thread. http://discussions.info.apple.com/webx?14@359.eCFBaxTl8oY.1@.68959e5e/ 790 It's a very long read but happens to be loaded with insights on the SP 1.8Ghz G5 Tower. It also helps explain why apple dropped this product. You should visit this site as well... http://www.g5freeze.com/index.html Unfortunately it documents that apple's hardware design team and software integration team might not really be a team. Many of the defects documented so heavily in the SP 1.8Ghz G5 Tower also manifest themselves in the rest of the G5 product line. Ominous. Tiger, quite frankly - SUCKS. On Aug 31, 2005, at 11:27 PM, Jan Melichar wrote: > Despite my best efforts my Mac (G5) will not automatically go to > sleep in response to the preferences I have set. In the process off > trying to track down the problem eventually I closed all > application but still no sleep. Disk Utility reports no problems > and Permission have been repaired after installing the latest > update to Tiger. > > Anyone any idea why this should be. > > Jan > _______________________________________________ > X4U mailing list > X4U at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/x4u > > Listmom is trying to clean out his closets! Vintage Mac and random > stuff: > http://search.ebay.com/_W0QQsassZmacguy1984 >