This works well for troubleshooting MIDI communication issues :
https://www.snoize.com/MIDIMonitor/

I also use MIDIGuitar2 , and usually I just use the IAC MIDI port to do this.

- Jay


MacPro 5,1/12 core@3.46GHz -- OS X 10.15.7 -- ATI 7970 -- 32 Gig RAM -- Crucial 500GB OS SSD -- Samsung EVO 1TB Audio/Sample SSD -- BIAB 2024 -- Logic Pro X -- Cubase Elements 14 -- Too many plugins