[Brad Gillie]

Thank you for the info. I tried the same thing with my Mbox 3 Mini on a Macbook Air. My system now recognizes the Mbox, and I am able to play audio through it. I am also able to use it to record and playback in Garageband.

Pro Tools is a different story. I am on version 11.3.1. PT recognizes the Mbox and allows me to select it as a hardware interface, but I am not able to open any of my saved sessions. When I go to open a session, I get an error message that says: "The current playback engine does not support a sample rate of 48 kHz" I get the same error for 44.1 kHz.

I am also not able to create a new session. I get this error message when I try to do that: "Could not create a new document because Assertion in "/Volumes/Development/151228/ProTools/DFW/MacBuild/../Views/UMenu.MacOS.mm", line 1549."