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usb keyboard not working

usb keyboard not working after update.


Posted on Apr 15, 2022 8:13 PM

Reply
Question marked as Top-ranking reply

Posted on Apr 16, 2022 8:51 AM

wilfriedw wrote:

usb keyboard not working after update.


Try a different port

try a differnt cable

try a different adapter

try a different keyboard and compare your resultss...


M1—try SafeBoot How to use safe mode on your Mac - Apple Support


Takes a bit longer to get to the login screen, does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.

Login and test. Reboot as normal and test. Caches get rebuilt automatically.


Intel—Try resetting NVRAM/PRAM Reset NVRAM or PRAM on your Mac - Apple Support

(get at least two-three rounds of the chimes when holding the NRAM Reset)




1 reply
Question marked as Top-ranking reply

Apr 16, 2022 8:51 AM in response to wilfriedw

wilfriedw wrote:

usb keyboard not working after update.


Try a different port

try a differnt cable

try a different adapter

try a different keyboard and compare your resultss...


M1—try SafeBoot How to use safe mode on your Mac - Apple Support


Takes a bit longer to get to the login screen, does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc.

Login and test. Reboot as normal and test. Caches get rebuilt automatically.


Intel—Try resetting NVRAM/PRAM Reset NVRAM or PRAM on your Mac - Apple Support

(get at least two-three rounds of the chimes when holding the NRAM Reset)




usb keyboard not working

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