Video showing setup.
This allows the Elecraft Kpod to be plugged directly into the MAC OS USB port. Once that is done you can control K4 Control Software by setting up the KPOD as a MIDI Controller and mapping the VFO and buttons whatever you like inside K4Control. Pre-Requisites.
On Mac OS Open your Midi Application
Applications->Utilities-Audio MIDI Setup.App
At the Top look for Window -> Show MIDI Studio and select it.
In the window that opens Select IAC Driver and open it.
Make sure the checkbox for Device is Online is selected.
Close out of the windows.
Unzip the application, and place it in your apps folder.