Today I imported (MacOS Catalina, 10.15.3) some RAW and JPG images from my Canon EOS R camera using ImageCapture. They are 3 CR3 bracketed (AEB) images and the JPG HDR created by the camera. Strangely, some icons are not visible in the Finder, and have a 'cross' on the upper left corner:
- The images are there: all can be opened in Preview, and Adobe DNG converter may convert them to DNG. The view option "Show Icon Preview" is enabled
- I tried to create a thumbnail using a newly created 'quick action' in Automator, and to drag that thumbnail to the icon shown in the 'Info' window for the IMR_0138.CR3 file; nothing happened. And, yes, I have write permission on the file.
- This is not related to the file type: JPG files in other folders have their icon, and one out of 3 CR3 files here has its icon.
How can I have my files with their thumbnails displayed? Thank you in advance for any help!