As I reported above, I tried 15.1.0 (shortly after installing the supplemental Catalina 10.15 update from Apple). It bricked my computer, and I was unable to collect any logs. I fought for hours trying to regain control of my computer, but in the end I had to pull power and boot into Safe mode and delete the Parallels app before booting normally. The result is that the virtual machine was left in a weird state. When I try to import it into VMWave (which I am switching to), I get the message that the VM was not properly shut down and it cannot be imported. I checked the config.pvs inside the nvm package and it says ShutdownReason=0,... is this okay? What else must I do to shut down the PVM (without access to Parallels Desktop). I am familiar with using the Terminal command line. Thank you or your advice.