I run a large MacPro that basically has the Monterey OS installed. I already have a VM running with Parallels Desktop to be able to use Windows programs. Since the MacPro is big enough, I would like to emulate the older Mojave OS in addition. Am I doing the right thing with Parallels? Thanks for the good answers, which hopefully will come. Hubert
The problem is solved. Quite simple - in Parallels Desktop in the menu item "New..." results in the installation of a second VM.