My Mac is unable to show icon previews after running the Parallels Clean Drive function and I don't know how to fix it because the advice online is to delete the system file com.apple.finder.plist and restart the computer. But com.apple.finder.plist is not in the Library/Preferences folder and when I restarts the computer it doesn't recover. So what do I do now?
Problem solved. Just started Activity Control and force quit com.apple.quicklook.ThumbnailsAgent then just restarted Finder and the problem was solved.
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