On 4/8/10, Bruce Ryan Nakamura <galilao at lava.net> wrote: > > Is your MDD a Firewire 800 model? If so, you will not be able to boot > up natively in OS 9. > > Only the Firewire 400 MDD's without Firewire 800 can boot natively in > OS 9. If your MDD is a Firewire 400 only model, then you need to get > the gray colored software install disks that were shipped with the > Firewire 400 MDD's. The retail edition of OS 9 will NOT run on > MDD's. I own 3 Firewire 400 dual boot MDD's and found out the hard way. > > You might be able to find the Firewire 400 MDD software install disks > on Ebay. Call AppleCare and request replacement discs for your machine. You'll need the serial number, but if they're available, should only cost S&H.