Garageband is a music software application that can be used to create and manage music. It can be used to create songs, albums, and tracks. It can also be used to store music. There are a number of ways to delete Garageband instruments and lessons on a Mac. One way to delete Garageband instruments and lessons is to open the application and click on the trashcan icon in the top left corner of the screen. Then, click on the trashcan icon again to remove all of the files that are associated with that instrument or lesson. Another way to delete Garageband instruments and lessons is to open the application and click on the Trashcan button in the top left corner of the screen. Then, click on the Trashcan button again to remove all of the files that are associated with that instrument or lesson.