comments:
guitarokx posted on r/mpcusers3w
no one commenting seems to have actually read your post. The issue is the Lightening cable. Thanks to Apple, you have to have the camera usb dongle so that the lightening cable can send data over the connected USB. The lightening to usb cables don't do this by themselves. Why? I dunno. Ask Tim Cook. This is the one I use: https://www.amazon.com/dp/B014VGHG0U