A good place to check on MacOS9 capability is here: http://support.apple.com/kb/HT1835 Eric S. Ronnie Day wrote: > Dave, > > I'd look on <lowendmac.com> and/or <xlr8yourmac.com> for specific, but > I'm 99% sure Bruce is correct that if your G4 is a dual processor box > with FW800 (squarish FW connector) it won't boot into OS9 at all. > Interestingly, the last G4 Apple sold was a single 1.25 GHz box that > would boot into OS9. It was introduced about the same time as the > first G5s. > > HTH, > Ron > > On Thu, Apr 8, 2010 at 10:38 AM, Bruce Ryan Nakamura <galilao at lava.net> wrote: >> Hello Dave, >> >> 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. >> >> Hope this helps. >> >> On Apr 8, 2010, at 5:19 AM, Dave Dent wrote: >> >>> Hi I'm new to Mac. I want to run a dedicated system just for Protools >>> 5.0.1. I have a G4 MDD 1.25 DP running OS 10.5, I need to run OS 9.2.2. I >>> have a 4 disk recovery set (OS 9.2.2 & OS X) but that is not working, it >>> keeps telling me after the first disk "communication error, check helper >>> tool, application bundle"? I would like to buy an original OS9 disk can you >>> lead me in any direction? " > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4