Photos 6.0 - export failed, Cocoa error -1
In Photos 6.0, I can view the thumbnails of all old and new JPG images, but when I try to export some older images I get the error message "The export operation failed to create a file for the photo identified below: Cocoa error -1"
I still have both iPhoto Library and Photos Library in my Pictures folder, since the launch of Photos in 2015. At the time, we were advised to keep both.
Has Photos lost track of where the original high resolution files are?
Help, please...
(iMac 27" 2020, MacOS 11.2.3)
iMac 27″, macOS 11.2