There are many issues with the macOS Big Sur version that we have already covered: camera not working in macOS Big Sur, Mac crashing after Big Sur update, display not recognized after Big Sur update.Ĭorruption of various files and settings can trigger such issues.

Upgrades of the operating system often have bugs and other problems that need fixing, so upgrading to the latest version can solve this issue too, if you notice the relation between the recent macOS upgrade to Big Sur and this Finder preview issue. Various issues can appear after the particular macOS update, so Big Sur problems are not entirely new. It is frustrating when the preview thumbnails disappear, and you can see the generic jpeg icon only.

To repair damaged system, you have to purchase the licensed version of Reimage Reimage.įinder won't show icon previews in macOS Big Sur is the issue that people report as annoying.