right side usb port detects only usb3.0 drives

Question

harshalrc Author

Level 1

4 points

right side usb port detects only usb3.0 drives

i am having macbook air13" early 2014 model running on macos sierra 10.12

suddenly usb 2.0 drives stopped working on right side port while same device is working properly on left port.

however right side port recognises usb3.0 drive without any issue.

MacBook Air (13-inch, Early 2014), macOS Sierra (10.12)

Posted on Sep 22, 2016 9:43 AM

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Answer 1

sterling r

Community Specialist

Sep 23, 2016 3:59 PM in response to harshalrc

Hey harshalrc,

Thanks for being a part of Apple Support Communities.

I understand some of your USB ports aren't recognizing USB 2.0 devices, while it does recognize USB 3.0 devices. Have you confirmed that the USB 2.0 devices can be recognized by other computers? If they don't, then the issue is likely with the device itself, and not your Mac. If they are recognized, then go ahead and reset the SMC on your Mac:

Shut down the Mac.

Plug in the MagSafe or USB-C power adapter to a power source and to your Mac.

Using the built-in keyboard, press Shift-Control-Option on the left side of the keyboard, then press the power button at the same time.

Release all keys, then press the power button again to turn on your Mac

Reset the System Management Controller (SMC) on your Mac

Take care.

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