Connecting the YRG MIDI Guitar to Garageband will allow you to trigger internal instruments with your guitar. You can record and compose using any instrument sound that is built in to Garage Band. Setting up the YRG with Garageband requires no special configuration. Simply start the program, connect the guitar, and turn it on.
A window should display that the number of MIDI devices has changed. This is the program recognizing your instrument.
Garageband displays an indicator of incoming MIDI signals at the bottom of the screen. Check that this light blinks when notes are played on the guitar.
Finally, simply select an instrument track that you want to by clicking on it and just play. Good luck and enjoy creating!