MIDI Monitor
Universal version latest seen at v1.5.4 · Reported by 12 Macs in the community.
All sighted native versions (2):
Sighting data is community-sourced — version availability and pricing should be verified with the developer.
MIDI Monitor is a free, open-source utility for macOS that displays MIDI signals flowing in and out of your Mac in real time. Musicians use it to troubleshoot MIDI connection issues and verify that controllers, keyboards and synthesizers are sending the expected data; programmers and audio engineers rely on it to test MIDI drivers and verify application behaviour. The app can spy on MIDI output from other applications and has been modernized with a Swift rewrite and support for macOS Big Sur and later. A native Apple Silicon build has been confirmed running on Macs in the Rosetta Check community.
AI Recommendation
1 suggestionMIDI Monitor ships as a native Universal Binary, so a native Apple Silicon build is already available. Download the latest version from the official Snoize website at snoize.com/MIDIMonitor/ — the installer automatically serves the correct architecture (native on Apple Silicon, Intel on Intel Macs) with no configuration needed. After installation, your saved MIDI Monitor documents and preferences carry over unchanged. The app is free and open-source under the BSD license, and the vendor continues to maintain it actively, so you can safely update and expect ongoing support.
Recommended reading
· 2 guides