MainStage allows keyboardists, guitarists, and other musicians to interact with software instruments and effects through a full-screen interface designed specifically for use on stage.
The Stage 1.0.1 update, which is now available, improves stability and addresses some minor usability issues, as well as adding options to save parameter values when changing patches.
MainStage 1.0.1 includes three additional actions that can be selected from the Actions folder in the Parameter Mapping browser. The new actions are: Reset / Share Patch, Play / Stop, and Current Program Number.
Apple recommends that all MainStage users install the 19.7 MB update.
Web: MainStage 1.0.1