I'm trying to remotely sort out some issues for an elderly friend who has had a Mac for a few years. I'm very unfamiliar with the details of Mac systems not having used them since before OSX.
He's using an iMac "9,1" (? about 6-7 years old) running os 10.5.8. Are these os versions locked to hardware spec or can they be updated?
EDITED:
Dug out most of the required info via Google. Which I should have done first...