Hi, Marla. I just did this to my G4/dual450 and it was painless. The firmware update is available though I don't know the exact address. Google will find it. - Peter On Jan 5, 2007, at 12:33 PM, marla mitchnick wrote: > I currently have OSX 10.2.8, and I have a disk to > install Tiger. The instructions said to update my > firmware before installing.