, try reducing the virtual RAM to 256MB during installation, or ensure you are using a clean, non-corrupted ISO, say users on B. Running on Vintage Hardware: Power Mac G4 MDD (Mirror Drive Doors):
In the past, Apple provided a free download of Mac OS 9.2.1 from their website. Unfortunately, this link is no longer active, and Apple no longer distributes the ISO file officially. mac os 9.2.1 iso
Not all ISOs are created equal. When downloading a Mac OS 9.2.1 ISO, ensure it is: , try reducing the virtual RAM to 256MB