Having difficulty upgrading to OS X ElCapitan on an older iMac.
Having difficulty upgrading to OS X ElCapitan on an older iMac. I am migrating from an older MacBook. The older MacBook couldn't upgrade to the latest software but the older iMac had it installed. When I wiped my iMac HD and restored from the last backup of the MacBook is when I found the problem. Do I need a CD to make the upgrade?
iMac, Mac OS X (10.4.7)