On 10/21/05 4:24 PM, Simon Forster wrote: > Not going to argue - just letting Linda know what firmware I've got > on my machine as a datum point. AFAICR, I've not done a firmware > update so must have come with the system. Likewise, my System Profiler reads 5.1.5f0, despite the fact that that Tech Doc says I should have a uniprocessor... I don't! It's a dual 2GHz G5. I've never updated the firmware, this is what Apple gave me. That Tech Doc might be a little outdated. I merely added my info since I'd posted in response to the original poster, not having had the "jet plane" syndrome here. Well, I confess I did for a day or two this summer, when it got to more than 90° in my office, but I went to System Preferences > Energy Saver and reduced my processor performance to Automatic and it calmed down... -Linda