To ensure OneNote tags are working and appear properly on Mac, follow these steps:

1. Check your OS version
   Check that you have the latest version of MacOS software installed.
2. Enable Tags
   Navigate to OneNote > Preferences > Tags and check that the show titles of tags box is enabled.
3. Restart
   Close OneNote and restart your Mac to ensure the setting changes take effect.
4. Verify tags are functioning
   Create a new page in a notebook and add new tag titles and check the tags are working properly.