USB device connected with keyboard gets disconnected due to an overcurrent condition

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USB device connected with keyboard gets disconnected due to an overcurrent condition

Hi,

bought a new 13,3" Retina Macbook Pro.

When I have my wired Apple Keyboard connected to the Macbook and connect an usb-device with the keyboard, from time to time the keyboard and the usb-device gets diconnected and mac osx tolds me, that there is not enough power for the devices. After a few seconds the keyboard and the device gets mounted again.

In the console I could see the following log:

kernel: USB Notification: The hub "Keyboard Hub" has reported an overcurrent condition. Port 3 has been disabled.

Is my Macbook broken?

Posted on Mar 30, 2015 4:00 AM

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Answer 1

OGELTHORPE

Level 9

57,305 points

Mar 30, 2015 4:12 AM in response to Diva D.

Diva D. wrote:

Is my Macbook broken?

Not likely. The given device is more apt to be that problem or it simply needs more power. Try the device on another USB port.

If you have concerns, make an appointment at an Apple store genius bar for a FREE evaluation. Bring all of the components with you.

Ciao.

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Answer 2

Diva D. Author

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Mar 30, 2015 4:14 AM in response to OGELTHORPE

On my old Macbook (Late 2008) it was no problem to have the exactly same keyboard, usb-cable and usb-device connected with the Macbook. I think a new macbook should handle that. :-)

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Answer 3

OGELTHORPE

Level 9

57,305 points

Mar 30, 2015 4:18 AM in response to Diva D.

You can try SMC and NVRAM resets:

http://support.apple.com/en-us/HT201295

http://support.apple.com/en-us/HT204063

It will do no hard to do this but a genius bar appointment may be your best option. I suspect this is a hardware problem.

Ciao.

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Answer 4

Diva D. Author

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Mar 30, 2015 4:19 AM in response to OGELTHORPE

I already did a SMC and NVRAM resets.

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Answer 5

OGELTHORPE

Level 9

57,305 points

Mar 30, 2015 4:22 AM in response to Diva D.

Then make that genius bat appointment. I do not see any software solution.

Ciao.

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Answer 6

Apr 9, 2015 10:16 AM in response to Diva D.

Hi,

I have the same problem with a new macbook pro 2015 and a new usb-keyboard bought together. Also, I did the SMC and NVRAM restate and didn't work. In two or three weeks I'll go to the apple store to check if another macbook pro has the same issue or if it's just my macbook.

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