MidiKeys

MidiKeys provides a virtual piano‑style keyboard that can be displayed on the screen of a macOS computer. Users can click or tap the keys to generate MIDI messages, which can then be routed to other music software, synthesizers, or recording applications. The interface is designed for quick, visual interaction without needing external hardware.

The tool is aimed at musicians, composers, and hobbyists who want a simple way to input MIDI data directly from their Mac. It is useful for sketching melodies, testing synth patches, or practicing finger placement when a physical keyboard is unavailable. Because it runs natively on macOS, it integrates with the operating system’s audio and MIDI routing facilities.

MidiKeys is classified as stable and is distributed as a core component for macOS users. Its primary distinction is offering an on‑screen, mouse‑driven MIDI controller that eliminates the need for additional devices while preserving standard MIDI output for downstream processing.