Developer Transition Kit (Keyboard not working) after latest MacOS Big Sur beta installed

Question

Created Feb ’21

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I am using Developer Transition Kit (Mac Mini). Just downloaded and installed Big Sur latest beta version (maybe 11.3 beta). When I restarted I only see the login page, but my wired keyboard and mouse did not response.
I tried to restart SMC by shutdown (press button), repluged power after 15sec, waited 5sec and power up Mac mini.
But still the keyboard and mouse did not response.
Need help.

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Answer 1

suitest-qa OP

Feb ’21

Have the same problem. Handled it with USB-C hub. So it looks like regular USB doesn't work in the last Big Sure update.

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Answer 2

etgohomes OP

Feb ’21

Yes, you are right. I purchased a USB-C hub and connected my USB dongle to allow both mouse and keyboard to work with the Mac Mini.
Then I update to 11.3 beta2 and the USB is functioning again.
But now the USB-C has no video output. And I cannot use dual screen.

1