3

After using my Mac for a while, I notice that some of the desktop space thumbnails blur and hide their window thumbnails in Mission Control. See the screenshot below for an example.

The only way I have found to resume showing all window thumbnails on all desktops is to log out and log back in. Closing the blurred desktop makes the next desktop blur instead.

I am using macOS High Sierra. I think I've observed the same behavior on Sierra, and I don't recall seeing it on macOS versions before Sierra.

What might be causing this?

I suspect the cause might be something that one or more video conference or screen sharing applications does, but I haven't been able to isolate which one or under what conditions. I think I have observed the symptoms after using multiple different applications, possibly including Google Hangouts, Hangouts Meet, Zoom, and GoToMeeting.

What might prevent it from happening?

enter image description here enter image description here

You must log in to answer this question.

Browse other questions tagged .