USB Accessories Disabled

Discussion in 'iOS 11' started by MTShipp, Jun 25, 2017.

  1. MTShipp macrumors 6502a

    Joined:
    Mar 25, 2009
    Location:
    Raleigh, North Carolina
    #1
    Anyone testing iOS 11 B1 or B2 experience that when they connect their device to a Mac using Sierra 10.12.5 they get a message in OS X that, "USB Accessories Disabled: Unplug the accessory using too much power to re-enable USB devices"?

    This happened in B1 and now in B2. If I revert the iPad back to 10.3.2 the messages never appear.

    I did submit this as a bug report. Wonder if others have it.

    This is with my iPad 12.9 second gen on my MBPro 2016 w/ TB connected via USB-C to Lightning.
     
  2. 4268256, Jun 25, 2017
    Last edited: Jun 25, 2017

    4268256 Suspended

    4268256

    Joined:
    Jun 23, 2017
    #2
    My iPhone is no longer detected by iTunes on my Mac, I'm on iOS 11 Beta 2 and macOS High Sierra. There's no message about power at all for me. Not sure if this is the same problem as yours though, as my MacBook is a USB-A MacBook.
    The difference with USB-C is that USB-C allows power transfer both ways, so there's a chance your iPad is trying to charge your MacBook or trying to charge with your MacBook.
     
  3. wanderlust19283 macrumors newbie

    wanderlust19283

    Joined:
    Oct 27, 2017
    Location:
    Chicago, IL
    #3
    I'm still having this issue with the 2016 touchbar macbook pro 13" and plugging in a 10.5" ipad pro. It's inconsistent, but will be resolved by me unplugging the ipad pro and then plugging it back in. I'm using apple's usb-c to thunderbolt cable as well.

    Anyone know of any updates to this, or any solution? Anyone else experiencing this?
     

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