One of my USB ports is being constantly disabled by my OS because it is drawing too much power, without a device attached. Is there any way to permanently disable the port?
Mac – How to disable a USB port that is drawing too much power
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Related Solutions
Well - if the port works, and you can plug in multiple other devices into the port it sure looks like the problem lies in the composite device and not the mac.
The only way to know if that type of device is broken or is just not compatible (and the mac is shutting it off immediately on detection to protect itself) is to take that device to another mac of the similar hardware and test.
Experience would say just that device is broken - but you'll have to test to know for sure.
USB power consumption information should be available in System Profiler. See the screenshot below:
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Best Answer
Short answer is no, you can't disable a USB port. Additionally, if you are having this issue with nothing attached to it, it's definitely a hardware issue.
First thing is to do an SMC reset.
If that doesn't fix the issue, you need to take it in for service because it's likely a logic board or component (connector issue). If I had to guess, it would be a short to ground of the 5V power rail on the USB connector. However, without actually getting hands on with it, it's only a hypothesis at best.