A set of C++ classes that provide a common API for realtime MIDI input/output across Linux (ALSA & JACK), Macintosh OS X (CoreMIDI) and Windows (Multimedia)
To install rtmidi, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install rtmidi
To see what files were installed by rtmidi, run:
port contents rtmidi
To later upgrade rtmidi, run:
sudo port selfupdate && sudo port upgrade rtmidi
Reporting an issue on MacPorts Trac
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Though anyone may search Trac for tickets, you must have a GitHub account in order to login to Trac to create tickets.