This is most probably caused by a change on the system, i.e. update of MacOS, and not by ID itself.
Updating the operating system always holds the risk that some software might not work anymore or behave irregularly. All you can do is either to wait for a patch (if there is none already), or switch back to old MacOS version.
If all other software on your Mac runs fine without crashes, you can assume the hardware is OK.
But it didn't sound like the poster changed to a new OS. However, over time, corruption can creep in.
Try creating a new user and running InDesign in the new user. If it runs OK, that means you have corruption. Continue to run from the new user, or back everything up, use Disk Utility to erase your drive, then reinstall the OS and reinstall InDesign.
Help>Extensions (or something along those lines)
Check to ensure you have no 3rd party plugins installed.
There's also the Clean Script for uninstalling Adobe applications
Surely something has changed on your system in the last few months, did you get any new peripherals or other things? Did you install any updates or have any other issues with other software/hardware?
I haven't changed to the new OS and all the other software runs fine on Mac.
Created a new user and InDesign ran just fine in the new user.
Don't have any 3rd party pludins installed and I ran Clean Script - that didn't help.
Now that you mention it... Speaking of peripherals, power went out in the middle of working on an old file from an external backup drive. That was about the same time as I started having problems with InDesign. This backup drive isn't ususally attached to the computer. Wonder if Indesign is looking for that old file or the preferences setup (InDesign doesn't seem to like me touching preferences) from the backup drive?