I have an old eMac G4 1.25 GHz running 10.5 Leopard, that I'd like to downgrade. Preferably to Puma/OS9. I know it wasn't ever officially supported, but is there any way to install an older version of MacOS? I noticed the similar speced Power Mac G4 1.25 can boot OS9. Any ideas what changed? Is it something to do with the firmware?
I've tried burning some install disks (9.2 and 10.1) I downloaded, but none of them seem bootable (don't show up when holding down option). I'm probably messing up somehow.
Is there a known good install disk image (OS9 or Puma) I can try along with instructions on how to restore it to CD or an external drive?
Thanks