Hello, @Iron Condor.
It's my pleasure to provide insights about updating QuickBooks for Mac in OS X Big Sur (111.0.1).
Currently, Big Sur 111.0.1 is under Beta, which means QuickBooks for Mac doesn't fully support it. That may be the reason you've experienced some unexpected behavior in your account. In this case, I recommend visiting the Apple website to report the unexpected issues you've encountered by clicking the Signup button.
We do hope that OS X Big Sur will fully be supported. So no additional clients will be affected. For more details, visit this article: Intuit’s support policy for QuickBooks for Mac running on macOS 11 Big Sur.
Also, I'll take note of this concern. And please keep an eye on our QuickBooks Blog. This way, you'll be guided with updates about Big Sur and newly published highlights in QuickBooks.
I've added this manual that you can use for your future tasks and to know the unsupported versions:
Let me know if you have follow-up questions by clicking the Reply button below. I'm always here to help.