Download of Band in a Box Update 2020.419 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Audio & Video Tools, more precisely Music Production. We recommend checking the downloaded files with any free antivirus. This free Mac application was originally developed by PG Music.
From the developer:
Band-in-a-Box is an automatic accompaniment program for Macintosh. You type in the chord symbols to any song, using standard chord symbols like C, Fm7, Cm7b5 etc. choose a style and press PLAY. Band-in-a-Box then generates a pro quality 5 instrument accompaniment of bass, drums, piano, guitar and strings in over 100 styles of music.
What's new in this version:
Updated: 2016 full and upgrade PDF Manuals. Added: Save Song as MusicXML feature added.
You may want to check out more Mac applications, such as Band-in-a-Box, Box Sync or Box Notes, which might be similar to Band in a Box Update.