I was trying to upload mp3 music from my mac to my watch using Garmin express however, the Music button did not appear.
Hi there, if you are unable to view the music section in Garmin Express, I would recommend deleting and re-installing Garmin Express: Instructions to Uninstall Garmin Express from a Windows or Mac Computer
If the issue still persists, here is a great troubleshooting option with additional things that could cause the music storage to not display in Garmin express: Managing Audio Content on My Watch Using Garmin Express
