To ensure a "bulletproof" live rig, MainStage requires significant CPU and RAM resources to process audio in real-time without latency. Beginners Guide: Intro to MainStage

For users of Sampler and Quick Sampler, version 3.6.6 resolves critical issues where voices could run out prematurely when using heavy sustain pedal sustain. System Requirements for Installation

MainStage 3.6.6 is a specialized live performance software developed by Apple, designed to turn a Mac into a powerful rig for keyboardists, vocalists, and guitarists. Version 3.6.6 is a point update primarily focused on refining stability and introducing several highly requested quality-of-life improvements for live musicians. Key Features of MainStage 3.6.6

Users can now enter fractional tempo values at the Concert, Set, and Patch levels, allowing for more precise synchronization with backing tracks.