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Unable to start Mac OS X virtual machine. It hangs with the grey screen

APPLIES TO:
  • Parallels Desktop 10 for Mac Home Edition

Symptoms

Unable to start Mac OS X virtual machine. It hangs with the error:

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Cause

Resolution

  1. Open your virtual machine's Configuration > Hardware Tab > Boot Order

  2. Add the following boot flag into the Boot flags field:

         vm.bios.efi=0
    
  3. Start virtual machine.



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