This interface was a well built and great sounding unit, however with experimentation and seeing the speed of the bus, I found out that there was vital information on the product missing on M-Audio's side

The M-Audio web site says this unit has not been cleared for Mac OS Sierra, so I suspect that's where the issue lies.

Not sure if I just have a bad unit, or if this issue is prevalent in this series

The unit has so much flexibility, from inputs to outputs to MIDI interface.

Decent unit for the money, but the ports are touchy from day one and require the wires to be

If you are looking for something that needs USB-C connector and are okay at USB 2.0 speeds this is a great unit and sounds great

On paper the unit is definitely an improvement over my old interface.