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My iPhone fails to connect to my mac via USB charger. The USB port and the cable are working. System Information shows that "unknown device (...not been configured)". I don't know why this happens?

  • Try connecting it to a non USB 3.0 port (into computer not into keyboard). Also is your iPhones jailbroken? Does iTunes recognize it?
    – John K
    Commented Jun 1, 2015 at 11:44
  • No iphone is not jailbroken nor itunes recognize it. And yes i installed mac on intel chip set mother board.
    – Parimal
    Commented Jun 1, 2015 at 11:47
  • Ok, try plugging it into your ocmputer ( or any non USB 3.0 port). Also, does your mouse or keyboard work in the same port? this site might help you
    – John K
    Commented Jun 1, 2015 at 11:48
  • Ok. Yes, At same port, mouse and keyboard is working.
    – Parimal
    Commented Jun 1, 2015 at 11:53
  • The only thing I can think of is resetting the SMC. It is risky, so backup. this tells you how
    – John K
    Commented Jun 1, 2015 at 12:40

1 Answer 1


Lots of reasons this could happen.

Rather than us guessing, here's the recipe for isolating the cause:

  • The article doesn't really help one isolate the issue to a specific cause
    – Oion Akif
    Commented Aug 4, 2017 at 15:51

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