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mymac419

Q: usb devices disabled

Message says unplug the device using too much power to re-enable USB devices.  The only thing I use it for is to charge my iPhone and sometimes my mini iPad.

Posted on Aug 6, 2016 1:39 AM

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Q: usb devices disabled

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  • by Eric Root,Apple recommended

    Eric Root Eric Root Aug 6, 2016 9:26 AM in response to mymac419
    Level 9 (70,028 points)
    iTunes
    Aug 6, 2016 9:26 AM in response to mymac419

    Have you tried another USB port?

     

    If the problem is still there, try booting into the Safe Mode using your normal account.  Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.

     

     

    Safe Mode - About

     

    Safe Mode - Yosemite