Why does my Mac keep switching desktops

Hi

I've updated to the 10.15.6 and now I'm getting black screens when switching between desktops.

It behaves as follow:

1. While being in a desktop I'm trying to switch to another one through gesture
2. The screen freezes for 1-2 seconds
3. The screen becomes black
4. The other desktop appears

I've never had this on older versions.

Any ideas why it happens?

Thanks

10.15.6 Blank Screen

I have the Blank screen also coming out of sleep mode, tested two different monitors, to confirm, it's Apple.
Can hear my audio email alerts, screen is blank, cut power, to fix.

JokerPower said:

Hi

I've updated to the 10.15.6 and now I'm getting black screens when switching between desktops.

It behaves as follow:

1. While being in a desktop I'm trying to switch to another one through gesture
2. The screen freezes for 1-2 seconds
3. The screen becomes black
4. The other desktop appears

I've never had this on older versions.

Any ideas why it happens?

Thanks

Click to expand...

10.15.6 here and no problem switching between desktops...

Not seeing this issue either.

Apple decided to break some new things rather than fix the already broken things to keep in the spirit of Catalina, the worst Mac OS release ever
Still on 10.15.3 here was hoping 10.15.6 would be the one to jump to...

Camarillo Brillo said:

Apple decided to break some new things rather than fix the already broken things to keep in the spirit of Catalina, the worst Mac OS release ever
Still on 10.15.3 here was hoping 10.15.6 would be the one to jump to...

Click to expand...

And how do you know it would offer you any problems? Up to your post it's a 50/50 split on working/not working.

Take a chance, roll those dice.

Lol, no thanks I have work to do on my computer

JokerPower said:

Hi

I've updated to the 10.15.6 and now I'm getting black screens when switching between desktops.

It behaves as follow:

1. While being in a desktop I'm trying to switch to another one through gesture
2. The screen freezes for 1-2 seconds
3. The screen becomes black
4. The other desktop appears

Click to expand...

That sounds to me like what happens on my triple-screen setup [w/displays have separate spaces] when I switch to mirrored [cmd-F1], or I connect to a fourth display, ipad sidecar. Sounds like the display settings are resetting for some reason.

Blank Screen Issue had now spread to the Sound, very obvious all is related to a User with a Display & Blank Screen.
I saw a silver glitch to my screen as a warning something happened.
I was using no Audio at the time of occurrence.
I caught the Audio change, because I have my Date Time/Clock checked to Announce the time: On the hour.
In System Preferences/Sound/Output > Type I lost HDMI, to fix just inconvenience yourself & re-boot.
No Supplement Update yet to be added to 10.15.6.
Business Users, COVID-19 Work from Home, COVID-19 Tracers; with Displays, not a priority, only Big Sur is.

big610 said:

Blank Screen Issue had now spread to the Sound, very obvious all is related to a User with a Display & Blank Screen.
I saw a silver glitch to my screen as a warning something happened.
I was using no Audio at the time of occurrence.
I caught the Audio change, because I have my Date Time/Clock checked to Announce the time: On the hour.
In System Preferences/Sound/Output > Type I lost HDMI, to fix just inconvenience yourself & re-boot.
No Supplement Update yet to be added to 10.15.6.
Business Users, COVID-19 Work from Home, COVID-19 Tracers; with Displays, not a priority, only Big Sur is.

Click to expand...

Are you a robot?

Robot mode is specifically for Apple. Any Mac Bug, requires full details - per Apple, that is what they need to even get close to understanding.

big610 said:

Robot mode is specifically for Apple. Any Mac Bug, requires full details - per Apple, that is what they need to even get close to understanding.

Click to expand...

OK. Confirmed.
Moderators?

serge94 said:

It's doing the same thing on mine but only when switching from the integrated GPU to the dedicated GPU. It's exactly the same behavior as when you're plugging an external monitor in. It doesn't do it the other way around though.

Click to expand...

Mine is the same. Black screen when the discrete graphics are activated. If I open an app that triggers the dedicated GPU, the screen goes black; Q to close that app, the display goes back to normal once the integrated graphics are back online. A reboot fixes it for roughly 8-10 hours. Really annoying. Seemed to appear around the time of the 10.15.3 update. I've noticed this bug on Mojave systems, as well.

culb0743 said:

Seemed to appear around the time of the 10.15.3 update. I've noticed this bug on Mojave systems, as well.

Click to expand...

That's bad

I've never encountered this on older versions of macOS

I'm on the Mac train since Sierra.

Hopefully, they will find the cause and release a supplemental update. Until then I'm sticking with 10.15.5

Obvious Apple is yet to know about the bug.
For Apple to find the bug, requires the community to phone & //www.apple.com/feedback/macos.html
If Apple is not aware of a bug, they will write the bug into the next macOS. [You get it in Big Sur].

Signed up to reply to this; it's been written into Big Sur, and it seems like only a few users are dealing with it. I hadn't dealt with it before updating, and it's killing my workflow. I'm under the impression that it may come from an application that relies on screen recording or the option of displays having separate spaces. Going to look into this in the next few days and see what I find.

Thinking about reporting it to Apple as well; will update soon.