I have recently purchased the Mavic Pro.  I hanve an inspire 1 and a Phantom 3.
My iPad mini -DJI GO app installed, used to recognize which drone I was connected to.  Now, when I hook up the Mavic to the controller using the USB port, my Inspire 1 camera mode still shows -no Mavic.

Any help? Please?

Did you download the DJI Go 4.x app? That's the one that DJI wants you to use with your Mavic, and I believe the latest firmware might not let you use the old 3.x version of the app on Android -- if that's the case, then the iOS Go 3.x app surely can't be long for this world, either.

As EX said you need to donwload GO4. You can still have and use both but one at a time.