Sure, using the help patch, the Phidget isn't recognized. getSerial doesn't return anything in the console and inputs and outputs are not registering after trying to start communication. The device doesn't seem to open. The led on the board lights up when triggering an input but Max isn't seeing it.
I found that Phidgets was not marked as "identified developer" on my Macbook. By accident, when installing another app, I found those check-boxes in "Security & privacy" preferences. Since I checked the check-box for Phidgets, it is working!