Installing Old OS X From Backup ISO's

Wondering if you can burn a backup of an old OS X disc and use it to install, or if they have some kind of copy protection on them. I might need to get some ISO’s, and do some old software testing.

I’ve done it with tiger and didn’t have trouble, weirdest thing about it the efi shell the older macs use; i’m assuming your talking about the power mac age of macs though

Any old Mac that gets the job done. My main focus is the discs, backing them up to ISO’s, and using those to install on any old PowerPC or Intel Mac.

Either way, thank you for the information.

np!
I realized I said efi shell when that is totally the wrong term. Modern systems are retconning my old systems knowledge lol