Mainstage-3.6.4.dmg -

Apple MainStage — A Brief Introduction | by Roger Foxcroft

Hold the Control key while clicking the app to open it. Allow it to re-scan your Audio Units (AU) plug-ins. This scan may take 10–15 minutes depending on your library size. MainStage-3.6.4.dmg

Understanding MainStage 3.6.4: The Definitive Guide to Apple’s Live Performance Powerhouse Apple MainStage — A Brief Introduction | by

Version 3.6.4 handles CPU better than earlier versions, but you must: but you must: