Virtual Machine is not extended to the second display in Full Screen with 'Use all displays' option enabled

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Symptoms

Virtual machine's (Guest OS) screen area is not displayed on an external monitor after entering Full Screen mode with 'Use All Displays in Full screen' and 'Use Mac OS X Full screen' options enabled.

Cause

Mac OS 10.9 Mavericks has introduced a new feature, "space per display", which is fully supported in Parallels Desktop 9 and above (starting from the revision 9.0.23136.932290).

Resolution

There are two options to use multiple monitors in Parallels Desktop on Mac OS X:

  1. Upgrade to Parallels Desktop 9 (9.0.23136.932290 and later) or above: Parallels Desktop menu -> Check for Updates...

    or

  2. Turn off the option "Displays have separate Spaces" in System Preferences -> Mission Control. Please note that this would affect all programs on Mac OS X.

     

  3. Log out and then log back in to your Mac user account

  4. Start Parallels Desktop and check if the issue persists.

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