This application is simple userland driver for the Native Instruments Maschine MIDI ports.
Since macOS Catalina, the Maschine MK I is not supported by the vendor anymore, you can use this driver to use the MIDI ports on the back of the machine.
Use Xcode to compile the application. After it's run, you should be able to see a new MIDI port in other MIDI applications.
This application is not tested with more than one Maschine connected to the computer.