How to uninstall Mp3tag on Mac
Save the tag changes you want to keep and back up your audio files before removing Mp3tag. If you rely on custom actions or preferences, preserve those too; the Mac app stores its data inside an app container that Homebrew zap removes.
Quit and remove the app
Quit Mp3tag after saving, then move Mp3tag.app to the Trash. Keep the edited music files; uninstalling does not reverse their tags. The Mac configuration instructions describe backing up settings, which is different from backing up the audio itself.
Review the local data
In Finder, choose Go › Go to Folder and open each exact path below. Copy anything you need first, then move only the app-owned item you have decided to discard to the Trash. These locations come from the Homebrew removal list or the recorded local check; a missing location needs no cleanup.
| Location | What to keep or remove |
|---|---|
~/Library/Containers/app.mp3tag.Mp3tag |
The app container can hold settings and app data; copy needed contents before removal. |
~/Library/Application Scripts/app.mp3tag.Mp3tag |
App-specific scripts named by the cask; preserve custom scripts you still use. |
Check the result
These commands only list the app and the locations discussed above. The app filename comes from the cask; adjust it if your official-download bundle has a different name.
ls -ld "/Applications/Mp3tag.app"
ls -ld "$HOME/Library/Containers/app.mp3tag.Mp3tag"
ls -ld "$HOME/Library/Application Scripts/app.mp3tag.Mp3tag"
An entry printed by ls still exists at that path. No such file or directory means that exact item is absent; Permission denied or Operation not permitted means the check could not establish its state. A retained data folder is expected if you chose to keep it. This check does not search every disk or cloud account.
If you installed it with Homebrew
Uninstall without running zap:
brew uninstall --cask mp3tag
This removes Homebrew's managed app artifacts without applying its zap list. The ordinary uninstall stanza also asks the app to quit. A “not installed” error means Homebrew has no matching cask installation; use the Finder route for a manually copied app.
The live cask source names these additional zap targets:
~/Library/Application Scripts/app.mp3tag.Mp3tag~/Library/Containers/app.mp3tag.Mp3tag
Some targets can hold settings or personal data. Keep the paths you still need and back them up before considering brew uninstall --cask --zap mp3tag. That direct command applies the cask's entire zap list regardless of Mole's checkboxes. Mole uses zap only when its complete scope passes its selection and shared-data checks; unchecked, shared, out-of-boundary or unsupported targets suppress zap, while selected remnants use Mole's own removal path.
What Mole lists
Mole selects exact bundle-ID container and Application Scripts rows by default, so uncheck them before uninstalling if you want to retain that data. An inaccessible container is not proof that the container is empty or gone. These defaults describe the app-data option switched off. Opting into Remove data and settings with apps also selects eligible reviewed app data; shared stores and protected data retain their individual review or protection.
What this test covered
The official universal Mac bundle and its scripts entry were removed on 21 September 2026. The small container remained with a permission-related refusal. The test does not establish a complete container cleanup or preservation of a personal music collection. Homebrew instructions were checked against the current cask, but this record does not establish a Homebrew-managed uninstall or removal of every possible leftover.