OS X Make music
GarageBand puts a complete music studio on your Mac, so you can make your own music to share with the world. You can create songs, ringtones, podcasts, and other types of projects in GarageBand. You can also learn to play your guitar or keyboard using the lessons included with GarageBand.
GarageBand comes on every new Mac.
Open GarageBand for me (if installed)
If GarageBand isn’t already installed on your Mac, you can purchase it from the App Store.
See also