If you have the genuine disk image on an external drive or backup, follow these steps:
MainStage does not install all its massive library (approx 30GB+) at once to save space.
The Mac App Store requires an internet connection. For users installing on a studio Mac that is intentionally kept offline (to prevent automatic updates or malware), a standalone .dmg file obtained from a trusted backup or secondary machine is the only solution. MainStage-3.6.4.dmg
Because this is a .dmg (Disk Image) file, the installation process is slightly different than installing an app from the App Store.
If macOS blocks the app because it’s not from the App Store (even if legitimate), open Terminal and run: If you have the genuine disk image on
sudo xattr -rd com.apple.quarantine /Applications/MainStage.app
MainStage 3.6.4 is not a headline-grabbing update, but it is a rock-solid maintenance release for musicians who depend on live software. If you are running macOS Ventura or earlier and need a dependable, professional live performance platform, this version delivers the same powerful ecosystem as before with improved stability on Apple silicon.
Rating: ★★★★☆ (4.5/5) – subtracts half a point for lack of new features, but core functionality remains industry-leading. MainStage 3
Since MainStage 3.6.4 is a specific and relatively recent update to Apple’s live performance software, this guide focuses on safely installing this specific .dmg file and optimizing the software for live use.
Connect your keyboard/controller via USB.