Greetings Mioman and welcome to the forum,

A search of Roland's website indicates the UM-1 USB to MIDI converter drivers will not be updated past Mac version 10.9 so that device may not help you either.

If you have not tried it yet, the Plague Sforzando soft synth included with 2017 Band-in-a-Box or available +++ HERE +++ is a good solution for Mac computers. The main difference from using the SD-20 is you have to run one instance for each midi track. BiaB loads the app and soft synth automatically for midi super tracks but you will need to load the app and soft synth for normal midi.


Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk Sonar - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home