I never could quite figure out what to do with my old Mac. It's a 2012 Mac Mini with an i7 and 16GB RAM. I never did get an SSD for it, which is a shame, but with Logos 10, I thought it was just going to be used via the web app since Catalina can't use Logos 10.
Guess what? I decided to reinstall the operating system which is fairly easy to do on a Mac. The performance was surprisingly good. Then I did an intermediate install of Logos 9. A small installation is quite nimble. This puppy runs just fine. I just boot up with a blank layout which is quite fast.
Not to be a total cheapskate, I ditched the monitor as it was from 2009 and a new one was a fraction of the cost and much better.