I run an old dinosaur; a late 2013 15" MacBook Pro (i7, quad core, 16GB RAM–soon to be retired) with Big Sur (11.7.7). Big Sur is unfortunately the most "recent" operating system supported by Apple for hardware this old. I’m upgrading in February.
As the subject indicates, the issue has to do with PDF files now showing their respective thumbnails, but only in Finder windows. Of note, earlier today, this was also true for PDF files on the Desktop (when looking at the Desktop itself). I was able to get these to reappear by following these instructions for killing com.apple.quicklook.ThumbnailsAgent within the Activity Monitor, then force-quitting (restarting) Finder. That process restored the thumbnails on the Desktop, but not PDF files viewed within Finder windows.
Finder does however render thumbnails for all other file types without issue. Only PDF’s are affected.
Any suggestions for how to fix this annoyance would be most welcomed.
..and thank you in advance!
Update 202211211230: result of qlmanage -m | grep pdf as follows:
