I tried installing my Parallels 9 license using the download from my account webpage on your website. It appears it won't install from High Sierra. What's the newest host? And what is the newest VMed Mac OS X that can run as an addition on Parallels 9 using this MacBook Pro? What's the oldest version of Parallels that will let me run a client of Big Sur side by side with an older Mac OS X on this Mac?
The other question I have is can I use a separate pre installed partition to build a VM of a Mac OS X OS on a Mac? I have several partitions on this Mac, running 10.11, 10.12, 10.13, 10.14, 10.15, and Big Sur. It would be nice to be to toggle between each without having to switch startup disk or startup manager configuration.
