Older images in Photos appear rainbow pixelated
Hi There,
I have a late 2009 iMac running Catalina 10.15.7. (The PC runs great so I hate to upgrade...haha) When I look at images in Photos the icons appear fine, but when I click on them I get a rainbow pixelated render. From what I can tell this happens with older images from my iphone 6. The images from my iphone 11 appear to work fine. I've attached an example and the image's info.
iMac, macOS 10.15