it is because you are using and old restore disk on a on 10.5 you need the dick that was released with that os, what you should do is find the os 9 install for os 10.5 install it came with the imac g5's it will not run all os9 programs, or partition your hard drive into two parts and run your restore disk on the second partition a little tricky but for a newb it may or may not work, but I am running leopard, panther, os9.2.2, and virtual pc on my 667 mgz On Apr 8, 2010, at 11:19 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