How to reset notification permissions on macOS

While working on your app’s notification permission flow it’s helpful to be able to test it as a new user launching your app for the first time.

This is how you can reset the permissions back to UNAuthorizationStatus.notDetermined↗ (opens in new tab):

1. Stop your app in Xcode if it’s running: ⌘ . or Product > Stop
2. Remove your app from DerivedData: open ~/Library/Developer/Xcode/DerivedData and delete your app’s folder(s)
3. Quit System Preferences if opened: ⌘ Q, killall System\ Preferences, or stop the System Preferences process in Activity Monitor
4. Restart Notification Center: killall NotificationCenter or stop the Notification Centre process in Activity Monitor

Done! You can now run your app again and test the flow as a new user. No need to restart your computer.

Bonus

If you have to do this a lot, here’s a one-liner to remove your app from DerivedData and restart Notification Center:

cd ~/Library/Developer/Xcode/DerivedData && rm -rf {YourProject}-??* && killall NotificationCenter

Remember to replace {YourProject} with your app’s project name.