Can anyone give me some advise on how i can quickly upgrade my imac from OS X 10.5.8 to the latest version OS?
Check to be sure your Mac meets the specs for Mountain Lion
Backup your data
Purchase Snow Leopard DVD
Upgrade to Snow Leopard
Update to Snow Leopard 10.6.8
Using App Store on 10.6.8 purchase, download and install Mountain Lion
Retrieving data ...