I recently acquired an older iMac 5,1 with 3 GB RAM, currently running Mac OS X 10.6.8, and from what I can gather online it is able to run "Mac OS X 10.7.5 Lion". I found that it is available for purchase on Apple's website for $20, but I do not consider $20 worth fixing up this old machine.
However, if this purchase was tied to my Apple ID or something and worked on multiple machines, that would be nice since it would mean I could fix up any other vintage Mac computers with this version of Mac OS X by signing into my Apple ID?
So, if I purchased an old version of Mac OS X, such as 10.7.5 Lion, what do I get exactly? An upgrade for just one machine? A license tied to my Apple ID? An ISO file for installing Lion? Do they ship a physical disc? Also, am I able to do a clean install or is it just for upgrading?