I set hot corners to bring up mission control. It stopped working. I rebooted. It still didn't work. When I bring up settings, there it is: "mission control". But it doesn't work.
Also, typing in "hot corners" in the support page brought up "if your mac feels hot". Good grief.
MacBook Pro (2017 – 2020)
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If you type "hot corners" in the upper search field in System Settings, it will take you to the correct place.
Also, The most current version of Ventura is now 13.5. (One caveat, there are several bugs in 13.5. The one most noticeable is the removal of being able to set individual apps to use location services).
That should take care of it but if not, try safe mode:
Start up your Mac in safe mode - Apple Support
Good possibility that updating will fix your specific issue. I just want to add that when I referred the location services, as a bug, that might not be correct. It may have been removed on purpose by Apple. Hopefully, Not! Time will tell.
I've identify a proximate cause. I have two Apple Thunderbolt displays, of slightly different vintage. One is at home and one is at work. I habitually use my MBP with the display plugged in via lightning(thunderbolt?)/USB-C adapter, with a logitech wireless keyboard RF xceiver and cheap optical mouse plugged into the USB hub in the display. When I transition between home and work, I unplug at one end and re-plug into the other display when I get there.
This has caused problems before. A couple of years ago the OS would crash occasionally when I went in one of the directions (don't remember which direction) - maybe a watchdog timeout, I can't remember. IIRC, I had to wait for the next update or two before it was fixed.
Anyway, last night hot corners were not working at home. When I plugged in at work today, they are working again. Maybe it has to do with the fact that the display USB hubs are older 2.0? Dunno, but since that's been the problem before, it's my prime suspect.
I guess I'll have to call support - when I have some extra time.
Um, I was not searching in support to find how to set up hot corners. I was searching (in the wrong place) to see if others had experienced this problem. Once I searched in the community, I found that indeed, others had had their hot corners settings randomly stop working (in Monterey and Big Sur).
So, bug NOT fixed in going to Ventura, so I don't expect it will be fixed by 13.4->13.5.
FWIW, I checked four Macs running Big Sur and later. Hot corners are working for me.
And they used to work for me! But the randomly stop working. Sometimes I can get them to work again. Right now nothing helps, including going to 13.5.
hot corners stop working - Ventura 13.4.1
