The HelpDesk team is often asked which is the latest version of the MacOS their Apple computer can be upgraded to. 

This is a link to an external site - The Otis College cannot guarantee accuracy.

https://everymac.com/systems/by_capability/maximum-macos-supported.html

MacOS names and versions are listed on this Wikipedia page. 

https://en.wikipedia.org/wiki/MacOS#Release_history