Hi Again, I tried that, I guess the installation of yellow dog erased the install of os 10. So it doesn't show os 10, and for some reason it doesn't show os9. Actually when I hold down the opt key all I get is a grey screen. Bob Kathi Anderson wrote: >Try starting up with the option key held down. You should be presented with >a choice of starting up with either OS. > >Kathi > > >