Opus 1 Music

professional music notation software

Download for M1 computers 11.0 or later

Download for 10.15 or earlier

Latest News

A new version of NoteAbilityPro - 64-bit is available for download and runs natively on with both Silicon and Intel processors and on computers running macOS 11 (Big Sur) through to macOS 14 (Sonoma).

NoteAbilityPro on the IPad can now be downloaded from the App Store. This version of NAPro can be used to edit scores created on the Desktop version and vice versa. Search on the App Store for "NAPro"

NoteAbilityPro - 64-bit (version 3.224) and NoteAbilityPro - 32-bit (version 2.658) are available for download for user running older operating system versions 10.6.8 through to 10.15.

NAPro has increased it playback capabilities with new orchestral samples and support for banks with different instrumental articulations.

NoteAbilityPro is now distributed as a free application. Customers who previously purchased NAPro will still be given technical support on an on-going basis.

NoteAbilityPro has been expanded to support up to 80 staves per system.

NoteAbilityPro now supports custom noteheads. Up to 240 graphic images can be added to the score and used as custom noteheads.

NoteAbilityPro can now support up to 6 Audio Unit players such as software samplers or synthesizers modules.

NoteAbilityPro scores can now be saved directly as audio files.

NoteAbilityPro can now import NoteWriter and MusicXML files.


NoteAbilityPro (4.011) for Mac OS-X

June 2024

NoteWriter (2.90) for Macintosh

September 1998

Site Map

Opus 1 Music is a premier music software solutions company providing music notation programs for Macintosh computers. The company was founded in 1996 by Dr. Keith Hamel, who is a professor of music composition at the University of British Columbia in Vancouver, Canada and a specialist in Computer Applications to Music. Dr. Hamel is also the primary researcher and software developer at Opus 1 Music.

Contact Us

These pages were designed by Keith Hamel
Last modified:


© 2000-2024 Keith Hamel