Parallels 20.x Unable to Run macOS VMs after macOS Update to 15.4

S

SinanK2

Junior Member
It just says:

"Error"
'Cannot start this virtual machine.'

After displaying the virtual machine monitor, and then promptly shutting down.

Anybody else seeing this?
 
Funny you should ask.
I haven't tested it, but after my latest upgrade to Sonoma 15.6, this issue seems to have resolved itself, EXCEPT:
Two VMs I relied on heavily had to be restored from backups. They still raised the same "cannot start VM" error, but I noticed some other macOS VMs had started working.
So something while the system was broken actually broke my favorite VMs with it too, thankfully I had backups and was able to restore them and move forward.
What a mess.
 
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