Mission Control is broken

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. The minor point update, macOS 27.0.1, did not appear to address the more significant issues.

Bugs should be reported to Apple here:

Feedback - macOS - Apple

“We” are users like you and have no information about when or if Apple will address any issues/bugs. Apple employees are generally precluded from even reading these forums, with the exception of moderators who only monitor for compliance with the T&C.

Historically, fixes for minor issues at release take a full point update or two to be addressed (x.1, not x.x.1 like the recent 27.0.1, those are typically security patches). But some issues take longer, and some never get addressed at all (either Apple changed a behavior, or the issue is system-specific and Apple cannot replicate it).

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.

Personally, Mission Control is working fine for my use cases on my 16" M4 Pro MBP running 27.0.1. I have many Spaces and open windows, but I don't use full screen apps and I don't have my apps grouped, both of which are associated with reported issues.

Hello,

What you are facing is a macOS 27 bug everyone is facing, including me, and I am on a new M4 MacBook Air as well. I understand hoe frustrated you are with the basic things of the device broken, and I am as much as you are. For me, Mission Control lags, the trackpad is confused between normal everyday gestures, and the macOS 27 used a whole extra 1GB of RAM. You are not alone, and its the software. There is no fix yet, sadly. If you are wondering how, it isn't because apple don't have beta software, its because they modified the Liquid Glass last second before launch, breaking Mission Control and the base of macOS, as this version didn't have a beta.

Hope this helps

There’s are things about mission control that don’t work the way they used to, or don’t quite work, but I don’t experience any jittering or any odd behavior with the animations or switching between desktops. However, I don’t use full screen at all, so there could be something there.

magsafe4_creator wrote:

What you are facing is a macOS 27 bug everyone is facing, including me,

How do you know "everyone" is facing it? Have you asked "everyone?" I think not as you didn't ask me. And I'm not having this issue. That doesn't change the fact that some people are having problems. But it also suggests that it may not be as simple as a bug in the new version of macOS.

Hyperbole is useful for catching attention. Accuracy and precision are better for troubleshooting.

IdrisSeabright wrote:

And I'm not having this issue. That doesn't change the fact that some people are having problems. But it also suggests that it may not be as simple as a bug in the new version of macOS.

I can replicate two of the issues that people are complaining about (switching out of full screen apps and moving grouped app windows, neither of which impact my workflow). Those are 'behavior' changes in Mission Control that seem consistent with what would be expected for a bug in macOS.

For the people complaining about 'lagging', 'jittering', 'glitching', etc., those are unlikely to be bugs and are most likely caused by 3rd party crapware the users have chosen to install.

There was a recent thread on interacting with folders using Stacks in the Dock causing the Mac to freeze. Two users were complaining about it, one definitively stated it was a macOS problem. After some cajoling, that user posted an EtreCheck report, which to my complete lack of surprise showed the user had BrickMyMac installed. Then the other user, who declined to post their EtreCheck report, stated he had a different flavor of 'protection' software installed.

I agree, I came here to post about Mission Control/Spaces, it just does not know what space I'm working on and popping open an app or a window or a dialogue box or interacting with Finder dances me around to a different space and just fks up my workflow.

Just now I tried using the dropbox icon in the menu bar at the top (for example), on the same space that I have my email, because I wanted to grab a link and paste it into the email, and every time I clicked on the dropbox icon it took me to another screen that didn't have my email app on it OVER AND OVER AGAIN until I rage quit the apps and reopened them again on the same space so I could interact in a non-insane way

farooqk1 wrote:

This is basically what I'm facing. You can see the dock 'jittering' in the video when moving in and out of fullscreen. If this user has reproduced the exact same bug I'm facing in a new user account, this user must have all the crapware too, right? For reference, I have no 'protection' apps installed.

Still not seeing the Dock 'jittering', on the video or on my own Mac. As for problems in a new user account, I trust you realize that apps (including crapware) can be installed for all users of a Mac, right?

I apologise if I'm coming off a bit rude and my observation may be wrong, but, the initial feeling I'm getting while visiting these forums is that a bunch of old members have grouped up, will refuse to accept that there can be an issue with MacOS itself and will just taunt the user that they must've done something wrong because everything is 'fine' on their end.

Speaking for myself, I've certainly acknowledged there are bugs in Mission Control (I can replicate issues with grouped apps and exiting full screen apps), and in other aspects of macOS Golden Gate. As a random, recent example, if you select a voice in the Chess app settings from the near the bottom of the list, you actually get the voice above the one you picked. Definitely a bug. Doesn't happen on Tahoe.

On the other hand, many people seem to think that because there are bugs with Mission Control, any issues they experience with Mission Control (or other parts of macOS) must also be a bug. Some may be, but I suspect many are due to conflicts with 3rd party software installed on those Macs.

Fair enough, sorry for that, but according to google, lots of people are, and that Mission Control is failing. My bad either way.

Same, Mission Control is all laggy, nothing basic works properly. I understand this, but no one here works at apple, so as apple community, I honestly don't know when apple might fix this.