Can't Update from 9.4 to 10.2 "Unexpected Error"

[rfollmuth]

I have been trying to update from 9.4 to 10.2, but then I will not open my catalog due to an "unexpected error". When I revert back to 9.4, it works perfectly. I use an iMac with Big Sur 11.4 with plenty of storage and 32GB of memory. Please help!

[DdeGannes]

Please post full details of your Computer specs including Manufacture date and installed GPU unit.

[rfollmuth]

iMac Retina 5K, 2019
Processor: 3.6 GHz 8-Core Intel i9
Graphics: Radeon Pro 580x 8 GB

--
* And when my time on Earth is done I will admit that I had some fun The
things that I'll regret the most Will have nothing at all to do with toast*

[GoldingD]

And when you upgrade to LrC v10.3?

see: https://helpx.adobe.com/lightroom-classic/kb/fixed-issues.html

[rfollmuth]

I follow the recommendations of Jeff Harmon. He has given 10.2 his “Seal of Approval”.

From the Toaster