I think you need this one for OS X: http://sonnettech.com/support/downloads/processorupgradecards.html#crescendoencore ... but you need to update to Panther 10.3 or higher first (a very impressive step up from 10.2 anyway). OS 9 seems to be increasingly hard to find these days. - Tony On Tue, Sep 30, 2008 at 8:26 AM, LeBron Rod <towerwalker at yahoo.com> 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. > > > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4 > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/g4/attachments/20080930/de514160/attachment.html