I cant upload another screenshot as it exceeds the permitted capacity but the history simply says: Import (08/05/2025 11:59.00)
Hope this helps.
By @PPC01
Yes the photo was just imported a few days ago. It is a brand new photo according to Lr 6 and LrC, with no edits. Which could certainly be because you synchronized folders before the transfer to the other computer (and it could be because of other causes as well). The B&W photo in Lr 6 was imported in 2021.
It may be that there is a 2nd copy of this photo in your LrC catalog in a different folder, with your edits. Please click on all Photographs, turn off any filters, and search by file name for this potential 2nd copy.
Hi again. I'm sorry I missed your last post and in desperation contacted Adobe Customer Care who connected remotely and seemingly restored edits. However, afterwards I discovered more isssue and had to call Customer Care again. This occurred several times and as a result, the file structure on my new Mac was a complete mess (not a good starting point for a new computer). In the end, I deleted everything and copied the Pictures folder from my iMac to the new Mac, but did not 'Export as Catalog'. Everything seems fine now, but I could not say why it failed the first time or succeeded the second. I've backedup the latest version and will keep my fingers crossed!
Many thanks for all your help.