I'm running Parallels Desktop 15.1.2 under macOS Catalina 10.15.2 and need to be able to run some pre-Catalina apps requiring Mojave. How do I create a Mojave guest, with Parallels Desktop, on my Catalina host? Note that I do NOT any longer have any Mojave installer, so I need some guidance as to how to obtain the needed Mojave installer! (There are MANY sites where I've seen how to obtain Mojave, but they all seem top assume either that you still have Mojave on the recovery partition or are upgrading to Mojave from an earlier version of macOS. I did download the "Install macOS Mojave.app" from Apple, but I am uncertain whether that contains everything needed to create the Mojave VM.