why are image thumbnails not displaying in finder since updating to sequoia on my m1 MacBook pro

Tried this. Not a solution that worked for me.

Removing plist does not work

Interesting. For myself, it's only PNG files that have a generic thumbnail image, whether they're on my local hard drive or on an external drive.

Don't do this with a PSD file, it will merge all the layers. Luckily I have a backup of the file.

Still a problem with 15.3.2.

Some jpg, png, tiff, HEIC, DNG and CR2 files randomly reappear, some not.

Did I mention that this issue is REALLY IRRITATING.

NO, I'm running 15.3.2 and the problem is still here !!!!!

Reported. But not holding my breath until Apple resolve the problem.

Not fixed for me. And I have also reported it via the Official Apple bug report page.

And it seems random which png, tiff, CR2 etc. files display correctly or not.

Upgraded to Sequoia 15.4 and no change. Thumbnails still not showing. Tried qlmanage -r but no luck with thaty either.

Something changed since my post. My work Mac lost its thumbnails again. I updated to 15.4, and the thumbnails didn't come back. My other Macs are still showing thumbnails ok.

Same, workflow at stand-still :(

Yup!

I can't see which message you were replying to. What was it that someone had done, that appeared to work?