I'm finding the hypervisor gets pretty unstable when running GraphicsMagick image processing jobs. I'm assuming it is using either the Intel Iris GPU or other instructions that the Parallels hypervisor hasn't fully gotten right. Symptoms: Run my unit test regression suite with GM resize and format checking jobs. Inconsistent but frequent: Chrome pauses VM pauses Gnome lockups VM error pause and restart with failed hypervisor event My guess is that Parallels could simulate this by running a Ubuntu 20.04 LTS VM on an Iris Graphics Mac with a bunch of concurrent GM resize jobs.