USB-C port is not working after Big Sur 11.3 Update
One of my USB-C ports stopped working after latest update to 11.3, can you please advise how to resolve this issue?
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Try running the Apple Hardware Test: How to use Apple Hardware Test on your Mac - Apple Support
If there's no indication of a problem it might be time to get an appointment at the nearest Apple Genius Bar or Authorized Apple Service Provider for a more complete diagnostic review.