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Update: It seems there are still memory leak issues. Noticed just now that one of our VM's were using 170GB of memory...
We upgraded to Parallels Desktop 20.1 last Thursday, and since, our VM's keep shutting down without warning. We have 2 macOS VM's running macOS...
I am having this same issue with Parallels 19 on a Mac Studio M1 Max with Sonoma 14.3.1, trying to install Ventura as a VM. Very annoying.