This quick guide explain you how to load Scaler into GarageBand.
Add an “Instrument Track” to your project and select the “Plug-ins” option in your Track view.
Inside the “Plug-ins” options select the actual instrument you have and replace it by Scaler.
Browse your installed Plug-ins and select “AU Instrument Scaler / Plugin Boutique / Scaler / Stereo”.
Scaler is now running, you can now enjoy, play and compose music. To export MIDI drag and drop the chord or chords to the instrument track of your choice.
PDF version: Scaler - Setup - GarageBand