Coherence mode greyed out on Parallels 12

I have recently updated to Parallels 12 using Sierra/Windows 7, but cannot enter Cohernece mode. It is simply greyed out.
There is no support yet for Parallels 12, and I have tried those for versions 11 and below.
I have tried reinstalling Parallels, and using Disk Utility to repair, but no effect.
I have also checked the Display adapters and there is only a Parallel VGA adapter, so no conflict there.

Any suggestions?
Plasticmat

 

Hi @MattE1
Have you considered reinstalling Parallels Tools?

 

Yes

Yes, twice (as I stated in my email). Any other suggestions?

 

Please try to disable all antivirus and firewalls and then reinstall Parallels Tools again.

 

I have done this but Coherence remains greyed out (using McAFee antivirus which I have disabled).
Any other suggestions?

 

Ok, please uninstall Parallels Display Adapter (WDDM), then reinstall Parallels Tools and check.

 

I have deleted the display adapter, but my Windows display now opens with very large fonts. What are the steps to reinstall Parallels from this point on?
Do i do the reinstalation from the Mac window or from Windows 7?

 

How do I reinstall the display adaptor for Parallels? I cannot find the Reinstall Parallels button

 

Can you please advise where this issue is? I cannot find it

 

@MattE1 we've received your reply:
Could you please explain in a step by step manner exactly how to uninstall Parallels, and then where to find the programme again to reinstall it. I am using Mac Sierra OS. I am new to Mac so am finding the process very different to Windows Thanks

 

I have the same issue, although it used to work fine. Can you explain a bit more? Can we uninstall/reinstall parallels desktop without loosing the virtual machine set up (I have a windows 10 VM). There are no other ways to fix this?

 

Please make sure you are not in any other view mode. If you are in full-screen or modality view until you exit that view coherence view will be grayed out. If Windows is in normal view then reinstall Parallels Tools before reinstalling Parallels Tools take a snapshot.

 

thanks, reinstalling Parallels Tools in the VM worked.

 

Glad to know!
Please contact us if you need any assistance.

 

Ok, me next. 13" MBP 2016 w/ OS 10.12.4. Neither of my .pvm work (10 upgrade, 7) w/ coherence. Same black screen as rest. Removed, replaced Parallels App & Toolbox. Reinstalled both 3x each. Works with window opening but not coherence. I followed the KB on locked permissions, didn't help. I get something about " failed to get coherence display bounds for (842,-1)" in my log. Does this help?

 

No. And it happens only on my MBP 13" & not on my MAC PRO with external Monitor.

 

We see that you have reinstalled Parallels Desktop and Parallels Toolbox three time. Have you tried reinstalling Parallels Tools and checked?