Try `killall -KILL Finder` in Terminal. Usually clears up graphical glitches. Try resetting Finder preferences. Run these commands in Terminal: rm ~/Library/Preferences/com.apple.finder.plist killall -KILL Finder Note that you will have to redo any Finder preferences you had set. If that doesn't work, follow [these steps](http://furbo.org/2015/01/19/clearing-the-icon-services-cache-in-yosemite/) to reset the Icon Services cache: sudo find /private/var/folders/ \ -name com.apple.dock.iconcache -exec rm {} \; sudo find /private/var/folders/ \ -name com.apple.iconservices -exec rm -rf {} \; sudo rm -rf /Library/Caches/com.apple.iconservices.store killall -KILL Dock killall -KILL Finder After the first command, it will prompt you for a password. Enter your login password.