No image preview in Finder or in Adobe
I have a late 2014 iMac and suddenly, in the last week, lost the ability to preview icons in the finder. As a designer this is enormously frustrating. Have tried all the fixes, have run utility repair, Onyx, everything I can think of and still no image preview. I've even downloaded update to Mojave to try to fix. I've thrown out finder preferences, literally have tried everything.
Absolutely stumped and incredibly frustrated. Anyone have a fix for this?
iMac Pro