Was overjoyed to see this project; had been trying in vain to get my old MIDISport 2x2 working with a 2015 MacBook Pro running macOS Monterey 12.3.1. I'm encountering the same issues as others have mentioned in the thread. When running the MIDISPORTFirmwareDownloader executable, I'm getting this error:

"Missing hardware configuration file. Usage: /usr/local/libexec/MIDISPORTFirmwareDownloader configfile.xml"

Any idea if this can be surmounted?