How to force Finder to update file thumbnails

filefinder

Recently I updated album covers in most of my mp3s, but their respective thumbnails on Finder did not get updated.

Things I tried:

Removed (rm ~/Library/Preferences/com.apple.finder.plist) without solving the issue at all
"touch"(ed) the files, which refreshed some – not all – the thumbnails

Any ideas on how to force a refresh of my mp3 thumbnail icons in Finder?

See the manifestation of this issue below:

enter image description here

Thumbnails are generated by QuickLook. You can reset its cache by typing qlmanage -r cache.

If this didn't work reset it completly with qlmanage -r.

Open /System/Library/CoreServices/Finder.app/Contents/Resources/English.lproj/

^{Use Show Package Contents to browse the package in Finder, or open using Terminal, etc.}
Open Localizable.strings in BBEdit or other editor capable of editing .strings files.
N4 contains the string that is used to name the duplicate file.
```
^0 copy
```
^{^0 is the previous file's name. Make sure to keep this to retain the name of the previous file.}
Edit the string how you wish. For example, to duplicate test as test_copy instead of test copy, use…
```
^0_copy
```
Save and relaunch Finder.
```
killall -HUP Finder
```

In any folder or window (including Desktop) simply press : CMD+J