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I've tried multiple USB inputs on my MacBook Air but the USB keyboard does not work since upgrading to Catalina.
I called Apple Support today and they fixed this issue. There was a corrupt file that had to be deleted. Here are the steps:
Did you try the keyboard directly on a different port?
Is the hub a self powered hub?
Have you tested the keyboard on another Mac to rule out a hardware issue?
Forgot to mention that I also did all the "magic" startup reset procedures several times, but the issue came back after a while. Once I even ran the diagnotics at startup without issues.
Well I haven't tried that one before...
Sounds like shutting down for a while did essentially what resetting the SMC does.
Still, they are all just temporary fixes. It'll come back.
And, it is broken again. Shut mac down for 10 minutes, doesn't work. Reset SMC, doesn't work. I guess I should go for a long run.
Apple USB keyboard not working since Catalina update
