ProTools and Mojave to Monterey . . .

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Thanks for another way of looking at it.

Tiangou wrote:
Never upgrade the OS when you're experiencing software problems.

It just complicates things. You'll end up compounding those problems with those of the new OS.

Fix the problems you've got under the OS you've got. Then consider an OS upgrade.

...Poking thru the Avid forums, looks like for some people the only solution was to downgrade the app to one version back. But those posts were really ancient. Dunno if that's possible or helpful.