My wife has a 2016 MacBook that she was about to trade in for $130 against a new MacBook Air she is buying. It needs a new main logic board because sound in all forms has stopped working, but if functions just fine as a silent laptop (even Bluetooth sound doesn't work).
The laptop currently runs Catalina, but I have found an installer for Mojave that I think will work (Apple doesn't make it easy to download older software).
For driver software, what is on the HP site now for 10.14 is Designjet Utility 1.0 from January of 2019. I know that version definitely fails to work for making profiles on newer OSs, but perhaps it behaves differently in Mojave? Any suggestions for tracking down HP Utility in an earlier iteration, before it was renamed Designjet Utility?
*I don't want to totally hijack the Catalina printing thread, but with this piece of the puzzle, Catalina will be able to print successfully with all the needed capabilities to add new substrates, as well.