Currently Being ModeratedJan 23, 2014 10:59 AM (in response to Anthony Acock)
Replace the cable with a new one. It worked for me.
Currently Being ModeratedMar 2, 2014 3:00 PM (in response to Csound1)
So have I .
This is occurring regularly on my 27" Mac. It doesn"t SEEM to be causing a problem, and I just switch it off. But the only thing I have plugged in is a USB keyboard.
I did have a hub, and an external hard drive but have removed these. Still getting the message.
I have switched off and disconnected from the socket etc. Still there.
Even when U had itenms plugged in, they all seemed to work OK.
I shall try getting a new cord to sync my i pad and i phone.