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2009-2012년 사이 제작된 13” 화면 Unibody MacBook Pro 모델.

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USB has power but won’t recognize any device

I have a 2011 MacBook Pro, my USB just stoped recognizing any usb drives and my iPhone. It will charge my phone but no data between the two or anything else?

The SD card reader works fine?

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Usb ports have different pins that connect to different independent rails on the logic board: power, ground and data, thus it can still supply power without exchanging data. There are 2 Usb ports on your Mac and you don't say whether both show the same issue..if that's the case it's very likely it's a logic board failure higher up in circuits of the logic board. If one works fine, check the pins of the faulty one from close and with a good light source, to check no pins are bent or oxidized. If you see dirt or oxide, try cleaning it with canned air and deoxidizing spray for electronics. Yet it might happen some final components have gone bad on the logic board for one single port only, each one has independent IC, resistors and filters.

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