Policy with Single App Mode worked for me as well. I used to use the
Casper Focus work around, but the policy is much simpler. For iPads in
AirPlane mode, as long as USB's are allowed when locked, I have had a
lot of success plugging them into a comp...
In any case, I think the "magic" was to quit messing with Content
Caching - which now appears to be a separate/related feature, and
instead use Internet Sharing. Just mentioning this, as I hadn't seen
that documented anywhere. I just ran into this to...
