Chosen Solution
As I have a lot of OS 9 software which I still use I am currently running OS 9.2.2, together with OS 10.1, on my G4 Mirror Door. I have just acquired another 3.5 inch 160 Gb hard disk with OS 10.5 installed on it. Can I install the new disk in one of the spare hard disk slots in the G4 and run 10.5 whilst still keeping 9.2 on the original disk? Also do I have to uninstall 10.1 from the existing disk before I run OS 10.5?
You can run 10.5.8 on the G4’s going back to the Beige machines. But classic mode OS 9 will not run with it. 10.4.11 was the last operating system that allowed classic mode. For a straight boot from OS 9, the last machine to do it was the 2003 Power Mac G4 1.25. Here’s a list of machine capabilities: http://www.everymac.com/systems/by_capab… Since your machine will take four hard drives you can have several combinations. The only real advantage that I remember with 10.5 over 10.4 is being able to use Time Machine. I currently have a G5 running 10.4.11 and 9.2.1 to be able to play all those old great games.
