Hi there, @DaveCanp.
I'm here to share with you some insights about the compatibility between macOS Big Sur and QuickBooks Desktop (QBDT) for Mac.
Big Sur is still under beta testing. Meaning, it will work with some versions and won't for others. Currently, the supported versions are QBDT for Mac 2020 R6 and later versions and QBDT for Mac 2021 R3 and later versions.
Our team is working hard to ensure the supported versions of QuickBooks for Mac will work as designed. If you want to download one of these versions, you can visit this page, then select the 2020 or 2021 version.
Also, here's an article you can read more about installing and setting up QBDT for Mac.
Moreover, I recommend visiting this link for more updates about Intuit’s support policy for QuickBooks for Mac running on macOS 11 Big Sur.
I appreciate your patience with this matter. If you have follow-up questions, please let me know by adding a comment below. I'm more than happy to help. Keep safe!
