Yosemite guest won't use dual monitors

[MichaelP2]

Is there a way to allow Parallels with a Yosemite guest use both monitors in a dual monitor host setup? The "View -> Use All Displays in Full Screen Mode" menu is disabled and when choosing to view in full screen only one monitor is used.

 

[Nikhil@Parallels]

Hi Michael,

You may please try the below steps and see how it goes.

1. Start virtual machine in normal Windows mode.
2. (Re)install Parallels tools: http://kb.parallels.com/112609
3. Open Configure: http://kb.parallels.com/en/117287
4. Options > Full screen > Enable "Use all displays in full screen"
5. Change Windows to full screen and check.

Feel free to let us know if you have any questions.

 

[MichaelP2]

Nikhil
That has no effect. The "Use all displays in full screen" is still greyed out. It does this similarly with a Mavericks guest and a Yosemite guest.
Mike