Lightning connector and iMac! USB draws too much power

Discussion in 'iPhone' started by jredecop, Sep 21, 2012.

  1. macrumors 6502a

    Joined:
    May 20, 2009
    #1
    I'm getting an error saying that there is a USB device drawing too much power as soon as I plug in the cable! I got two phones and both cables do this, but it's working fine on my macbook air.

    Anyone else with this issue.
     
  2. macrumors 6502a

    Joined:
    Jun 18, 2009
    Location:
    Los Angeles
    #2
    What iMac do you have? If it's an older one, it probably doesn't have the added power that Apple added to later models. Time to upgrade?
     
  3. macrumors regular

    Joined:
    Jun 11, 2009
    #3
    +1
     
  4. jredecop, Sep 21, 2012
    Last edited: Sep 21, 2012

    thread starter macrumors 6502a

    Joined:
    May 20, 2009
    #4
    Its the 2009 model. I unplugged everything and rebooted it and now just one cable does it, looks like I got a bad cable:confused: The bad cable wont work on my macbook pro either, its a 2012
     
  5. macrumors 6502a

    Joined:
    Jun 18, 2009
    Location:
    Los Angeles
    #5
    They started adding more power to the USB ports after the iPad. Yours unfortunately isn't included in there. So with your other devices connected, it is drawing too much power. You don't have a bad cable.
     
  6. macrumors 68040

    Joined:
    Apr 6, 2007
    #6
    The iOS Devices have always been pretty crap when it comes to USB power. I remember the first iPhone blowing the USB hub in my old iMac - needless to say Apple fixed it free of charge, but it never did work properly.

    I wouldn't be at all surprised to see a thunderbolt cable on offer for it soon. You wont be able to draw power, but it'll work fine for data.
     
  7. jredecop, Sep 21, 2012
    Last edited: Sep 21, 2012

    thread starter macrumors 6502a

    Joined:
    May 20, 2009
    #7
    Same cable acts that way on my 2012 MacBook Air.
     
  8. macrumors 68020

    Joined:
    Oct 14, 2011
    Location:
    Ohio
    #8
    Don't you mean 2012?
     
  9. macrumors 68000

    mofunk

    Joined:
    Aug 26, 2009
    Location:
    Americas
    #9
    I get that warning when I plug my iPod Touch and iPad 3 to my Macbook Pro. So I switch the ports and its fine. On my MBP the usb port that is closet to the power port is the one (I think) is causing the error.

    Try switching the ports.
     
  10. thread starter macrumors 6502a

    Joined:
    May 20, 2009
    #10
    Lol, yes...getting my f150s and macbooks confused.

    Its confirmed, its just one cable. Does it on both computers. I thought that both cables did it but one is working fine on my computers and the other is giving the error.
     
  11. macrumors newbie

    Joined:
    Apr 26, 2009
    #11
    This happened to my iPhone 5, suddenly my mac mini USB lost power and can't connect to my iPhone 5 & even my USB mouse lost connection to my Mac Mini!

    Then I tried using the plug to the power directly, no luck.

    I tried rebooting the iPhone...and booting it up...no luck...but after a while of not charging...I tried another plug for my iPad (The new iPad 3rd gen) it works!

    Not sure what happened...

    Then just now, it happened again...iPhone 5 not charging :(
     
  12. macrumors 68000

    deannnnn

    Joined:
    Jun 4, 2007
    Location:
    New York City & South Florida
    #12
    You're using a USB port on the iMac itself right? Not on the keyboard or via a USB hub? A 2009 iMac obviously supports the iPhone 5. I just helped set my friends up on a 2007 white MacBook.
     

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