JPG's not displaying correctly in Finder.
For some years now, device and version irrespective, users have been complaining in this community in now closed threads about some jpg's and png's not showing up correctly in Finder. None of the suggested solutions that I found worked for me. The only consistent workaround that I have found is to reduce the file size when saving a jpg file, when the option appears in Photoshop. It seems to be an issue with files which have undergone significant processing, so increasing the file size. Why Apple have not done anything about it is beyond me. Surely if a file is too large to display properly, the system should provide a warning or the limit should be removed.
Imac Retina 27" 2020. Sequoia 15.6.1
iMac 27″, macOS 15.6