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I have more bugs. This morning the window manager didn't work (no mission control, hot corners or gestures on trackpad to activate any window functions and F3 didn't do mission control either). Using a couple of desktops as a part of day to day productivity. Tried killing the window manager in terminal. Got logged out. Could not log back in, was just spinning. Had to force restart.
12.4 certainly a daily adventure. (again may be compounded by buggy software)
 
No signal on my monitor from my Mac mini after the update from 12.2 to 12.4 (I skipped 12.3 because it dropped /usr/bin/python and I was afraid of getting into trouble)

OK. After the update, my Mac mini doesn't recognise the LG monitor via HDMI anymore. The only way I can get a screen is virtually, by using Apple Remote Desktop (1280x1024 oh joy) from another Mac. Also, the problem with USB storage not being recognised during boot is still there. Thunderbolt drives mount perfectly on reboot, USB drives require unplugging/plugging to get them mounted. This is really horrible quality. I'd like to keep up to date because security is a major concern, but this way, updating is really a gamble.

Tried a safe boot, no success. Basically, HDMI to my LG is an LGR HDR 4K

I would welcome a fix.

And really, de facto making my mini unusable, come on, Apple, why do you produce such buggy code?
 
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No signal on my monitor from my Mac mini after the update from 12.2 to 12.4 (I skipped 12.3 because it dropped /usr/bin/python and I was afraid of getting into trouble)

OK. After the update, my Mac mini doesn't recognise the LG monitor via HDMI anymore. The only way I can get a screen is virtually, by using Apple Remote Desktop (1280x1024 oh joy) from another Mac. Also, the problem with USB storage not being recognised during boot is still there. Thunderbolt drives mount perfectly on reboot, USB drives require unplugging/plugging to get them mounted. This is really horrible quality. I'd like to keep up to date because security is a major concern, but this way, updating is really a gamble.

Tried a safe boot, no success. Basically, HDMI to my LG is an LGR HDR 4K

I would welcome a fix.

And really, de facto making my mini unusable, come on, Apple, why do you produce such buggy code?
This has been solved by an SMC reset. As it turns out macOS (both on this mini via HDMI and on an iMac via USB-C to displayPort cable) misidentifies the LG HDR 4K monitor, thinking it is a 5K monitor. And while Screen preferences think it is being used at 30Hz, System Information thinks it is 60Hz. All in all rather messy.
Screenshot 2022-05-21 at 18.27.57.png

This might have something to do with the problem. Also, I was using the monitor in 1440 scaling (as opposed to the default 1080).
 
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Big Sur 11.6.6 introduced a nasty bug that makes Preview reject PDF file downloads and attachments as the user “not having the permission to open it.” There are work-arounds, but this needs to be fixed.
 
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