MuseScore

MuseScore is a professional music notation program that’s cross-platform and open-source. In addition to a full set of notation and formatting feature, text support, and MIDI import/conversion, MuseScore offers playback capabilities with a mixer, MIDI output, synthesizer, and SoundFont samples. For getting started, there’s a Startup Wizard Tour feature along with a library of video tutorials. Other features include support for MusicXML files, early music, fretboard diagrams, keyboard shortcuts, and much more. (See the MuseScore 3 Handbook for more information.)

MuseScore 3.4.1 is freely downloadable open-source donationware for macOS 10.12 and later, plus Linux, Windows, and additional platforms.