After upgrading Parallels Desktop for Mac, I receive the following error message:
The virtual machine cannot be started due to a critical error.
- Quit Parallels Desktop.
Open Activity Monitor.app and make sure that prl_disp_service process is quitted. If not, click the cogwheel icon > select Quit.
- Open Parallels Desktop and start the virtual machine.
Note: If the instructions above do not help, reinstall Parallels Desktop application. Download the installation image of your Parallels Desktop version here.