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Running current software on old macOS versions is not a fight you're going to win. Software publishers simply don't test it and won't fix bugs.
If you have old software you need to run you need to dedicate this computer to that task (and never update it), or figure out how to run it in a VM or buy an old MacBook.
If you are using old macOS you need to turn off auto updates on any current software (if they allow that) and be very careful about installing future updates.
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Thanks for that. Food for thought. I'll let you know how it goes.
Part of the reason I find bicycles life-enhancing is that you can endlessly repair them. And a well-maintained bike from 30 or 40 years ago is actually just as useful as a new one if you discount racing.
From this perspective, overt designed-in obsolescence is an abomination.
#World gone wrong!
de_Selby
The Mac OS is on constant auto update as far as September. It's on Monterey 12.7.6. The machine won't happily run later versions of the OS.
iMac (Retina 5K, 27-inch, Late 2015)
3.2 GHz Quad-Core Intel Core i5, 16 GB 1867 MHz DDR3 (yes, extra RAM!)
The last thing I want to do is go through the hassle of reinstalling MacOS when I'm pretty sure it isn't the OS that's at fault.
Word for Mac is Version 16.89.1 , recently auto-updated.
I'm techie enough to have kept this machine running, and several Macs before it. This is the first time I've run aground in 30 years. But very tech savvy? No.
I've done all that stuff about experimentally removing plist preference files. It makes no difference.