Remove unused Finder tags

Solution 1:

To view all the available tags in Finder, follow these steps:

1. Enable display of tags by going to Finder → Preferences → Sidebar → Tags → Recent Tags.

2. In the Finder menu, enable show Sidebar and Status Bar if they are hidden.

3. Under Tags section in the Finder Sidebar, click on All Tags.... This will display a list of all the available tags (pre-created + custom) sorted alphabetically.

4. Click to select a tag from the list. The count of files/folders associated with the tag is shown in the Status Bar.

5. To delete a tag, right click on it and select Delete Tag "Tag_Name"... from the context menu.

For more information on tags in Finder, refer to the Apple support document, macOS Sierra: Use tags to organize files.

Solution 2:

Using Terminal

Given to a shell, this returns the count of files tagged with the tag named Yellow:

mdfind -count 'kMDItemUserTags = Yellow'