Mac reboots when you attempt to launch Parallels Desktop 8 and Virtual Box simultaneously

Article ID: 115966 
Created On: Apr 15, 2013
Last Review: May 2, 2013
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APPLIES TO:
  • Parallels Desktop 8 for Mac
  • Parallels Server Bare Metal

Symptoms

Your Mac may experience occassional crashes while running Parallels Desktop 8 or Parallels Service Bare Metal at the same time as KVM or Virtual Box.

Cause

This issue is caused by incorrectly working third-party virtualization engines that do not ensure that the virtualization state remains consistent with the state of the actual CPU.

Resolution

For KVM: 

Set the KVM module variable "vmm_exclusive" to 0.

for Virtual Box:

No workaround is available. Please try not to use Parallels Desktop and Virtual Box at the same time.