Hi! Have you shutdown for a period of minutes and pulled all power from the unit? And, have you started up in safe mode? And, have you reset PRAM and NVRAM? Sometimes these works for me. Lee On Oct 30, 2009, at 1730, Mark Des Cotes wrote: Hi all, I'm at wits end here. My 2.1 GHZ iMac G5 iSight running 10.4.11 with RAM maxed at 2.5GB has become so slow to respond that it's aggravating. The ......