Did you do a clean installation Paul? That would be my first thought. Backup your data. Wipe the disk. Clean install SL. That should clear all of your problems. cjc On 25/06/2011, at 7:55 AM, Paul Moortgat wrote: > Now with the new SL system my Mac Pro wakes up each time I put the Mac to sleep. Shut down is the only solution. Any idea? > > Paul Moortgat