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krystyna19
User level: Level 1 (5 points)

Mission Control problem Mac OS 27

Hi everyone! Does anyone know when Apple is going to fix the issues with Mission Control?

I recently updated my 2026 MacBook Air, and Mission Control has become extremely buggy. When I open it, the window previews at the top sometimes appear black. If I try to open another app or click an empty area of the desktop, the last-used app opens again instead.

Switching between apps and open windows has become very difficult. I now have to constantly select apps from the thumbnails at the top of Mission Control, especially when they are open in full-screen mode.

Is anyone else experiencing the same problem, or has Apple announced when it will be fixed?

Posted on Sep 28, 2026 12:43 PM

3 replies

neuroanatomist
User level: Level 9 (72,871 points)

Sep 28, 2026 12:45 PM in response to krystyna19

There have been many issues reported with Mission Control and Spaces on macOS 27 Golden Gate, especially regarding the way Full Screen apps and app switching are handled. Some have been resolved by identifying and removing incompatible 3rd party extensions, others are bona fide bugs. 

 

See if the problem is present when you boot in safe mode. That process performs some system cleanup and clears caches, and also disables 3rd party extensions that may cause problems.

 

Start up your Mac in safe mode - Apple Support

 

If that does not correct the issue, test in a new user account. A newly-created user account will have all settings at default, and if the issue does not occur in that new account then it provides guidance on what may need to be changed to correct the issue.

 

Add a user or group on Mac - Apple Support

 

Once the testing is complete, the new account can easily be deleted.

 

Delete a user or group on Mac – Apple Support

 

Those steps will help to isolate the problem.

 

It might help to download and run EtreCheck, written by a long-time forum member. The free version is fine. Post the full report using the Additional Text button. No personal information is revealed. 



If the issue persists in safe mode and a new user account, that suggests that it's a bug that Apple needs to address. Bugs can be reported to Apple here:

Feedback - macOS - Apple

 

Reporting issues like this to Apple is the only way to get them fixed. They do prioritize bugs based on frequency of reports, so the more people who report it, the faster it will be addressed.

Allan Jones
User level: Level 10 (85,896 points)

Oct 16, 2026 10:12 AM in response to Doug Pasnak

Apple will not see bug reports in this user-to-user setting. If neuroanatomist's steps did not help, by all means use the feedback link to place the issue before an Apple employee The more reports they get, the more likely they will allocate resources to fixing it.

Doug Pasnak
User level: Level 1 (4 points)

Oct 16, 2026 10:02 AM in response to krystyna19

I have closed all my additional desktops and completely shut down, then rearranged my app layout and the problem persists. Desktops overlap, text in menu bars is scrambled, and apps shift between desktops or duplicate across multiple desktops.

Originally posted at discussions.apple.com/thread/256366707