Ah I am having this issue too. I haven't tried to use the MIDI ports in a long time but it used to be there.
I have just tried to start using it in Mackie MIDI mode with other software though on OSX 10.12.6 (iMac Retina 5K i7), and the Eucon is not showing up in Audio MIDI setup or in other software that uses Mackie MIDI control.
I have tried removing cache and both MIDI & Eucon prefs, ensured firmware is up to date, and a clean reinstall, resetting permissions, followed by adding the applications to the Eucon preference pain, restarting Mac etc and still cannot see the MIDI device as described in various setup instructions.
The MIDI driver is in the correct place but not installing or appearing.
Is Eucon appearing in AudioMIDI setup for other people? It used to be there from a much older version but wasn't working so as the instructions advised, I deleted that with the expectation of it being recreated with the latest driver.
