Non-admin users can't access Tor Browser on macOS
The TorBrowser.app directory is distributed in the macOS disk image with permissions set to 0750. When it is copied to /Applications, the Finder sets the user to the admin user that did the copy, and the group to 'admin'.
This means that non-admin users can't read or execute Tor Browser.
Historically, this was a feature, because potentially sensitive Tor Browser data was stored in the application bundle. But now that data is stored in ~/Library/Application Support or next to the app, it's a bug.