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"Enter Coherence" option is grayed out

APPLIES TO:
  • Parallels Desktop for Mac Business Edition
  • Parallels Desktop for Mac Home Edition
  • Parallels Desktop for Mac Pro Edition

Symptoms

Unable to enter into Coherence mode because this option is grayed out.

Cause

Conflict between Standard VGA Graphics Adapter driver and Parallels Display Adapter (WDDM)

Resolution

  1. Go to Start Menu.
  2. At the search bar type Device Manager
  3. At the Device Manager expand Display Adapters.
  4. Right-click on Standard VGA Graphics Adapter (Microsoft Basic Display Adapter in Windows 10) > Uninstall it.
  5. Reinstall Parallels Tools (Actions menu > Reinstall Parallels Tools ) and restart Windows.
  6. Open Device Manager and check Display Adapters. Parallels Display Adapter (WDDM) should appear in the list.

Now you are able to run virtual machine in Coherence.




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