On Sep 30, 2008, at 8:26 AM, LeBron Rod wrote: > I recently purchased a Power Mac G4 AGP 500MHz Single Core CPU, > 100Mhz Bus, 60G Hard drive, 2G RAM (upgraded by me), running OS > 10.2.8. I then purchased an upgrade Sonnet 1.8GHz CPU. The problem > that I have run into is that the firmware that came with the new CPU > requires that you boot from OS 9 in the Start Disk. I do not have OS > 9. Apparently, the Seller of this unit upgraded the OS without using > the original disks. I know very little about Apple products, but I > really like this machine and I am anxious to learn a great deal more > about this product since I find the OS is far superior to anything > that Microsoft has. I need a crash course on this machine, > particularly how to upgrade the CPU. I would also like to purchase > the OS bundle that includes OS 9. Any information would be greatly > appreciated. If you can, upgrade to Panther or Tiger, and read this: http://briandeuel.blogspot.com/2007/11/powermac-g4-dp500-mystic-sonnet-upgrade.html Ths is my experience upgrading my DP500 with the same processor card. Brian