Ask Max: Is it possible to install a 10.4 partition on a G5 iMac running 10.5?
I have an iMac G5 running 10.5 and I'm just wondering if I can partition my hard drive and install 10.4 and run OS 9 on the same hard drive for games that requires OS classic 9
You can run the older 10.4 Mac OS on a partition of the drive if that computer originally was capable of running that OS. So if you have version of 10.4 that came with that iMac G5, you can install that on a partition or external hard drive. Then you just need to install Classic OS 9 support and you should be set.
I do this on a few test systems here, and have no problem bouncing from 10.4 to 10.5. Just use the Startup Disk System Preference to change which partition you want the Mac to boot from and restart.
Hope that helps,