Q: imac software upgrade

Hi...

It's not free but you can purchase v10.7 at the UK Apple Store online > http://www.apple.com/uk/search/OS-X-Lion?src=globalnav

If your Mac meets the requirements, you can upgrade v10.11 El Capitan for free for the App Store.

Upgrade to OS X El Capitan - Apple Support

Lion is a paid upgrade and requires a Mac with at least a Core 2 Duo(not Core Duo) or Xeon CPU, as well as at least 2GB of RAM. Download codes for it can be bought from the online Apple Store.

(141286)

No, it's the same price.

Please re read my first reply to you. Your Mac may be able to upgrade to El Capitan for free.

Did you find this free download of Lion 10.7 on a torrent web site. That is the only place it can be downloaded for free.

If so it probably has so much additional malware included with it that you should not just erase your disk drive and start all over again.