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Failure of a keyboard recognition

My Mac Pro does not recognize the A1243 keyboard but it recognizes the A1048 keyboard.

On the other hand, My MacBookAir recognizes both keyboards.

Why my Mac Pro does not recognize the A1243 keyboard?

Mac Pro, macOS 10.13

Posted on Feb 25, 2019 10:02 PM

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Question marked as Best answer

The reason I asked is that I sometimes get a message that my keyboard is "not recognized", and it asks me to type a particular key (so it can know the layout). The next message says it can not identify the keyboard.


Then the keyboard proceeds to work flawlessly.


--------

Clearly, you have a FAR more serious problem than my occasional messages.


Apple Keyboards have a reputation of becoming unreliable (maybe as extreme as not being seen by Hardware) when used on a USB extension cable. They also do not support any USB peripherals in the "convenience" USB jacks except an Apple low-power mouse. (I did manage to clobber my numeric keypad when trying to plug a nominally self-powered printer into the "convenience" USB port. I did not notice until my credit card number was entered incorrectly when placing an online order.)

Posted on Feb 26, 2019 7:24 AM

10 replies

Feb 26, 2019 12:55 AM in response to lllaass

Thank you for clarification.

MacPro is late 2013 and it recognized the A1243 KB more than 3years.

Then MacPro did not recognized the A1243 KB one month before but it recognized the other A1243 KB for one month. Now it does not recognized both A1243 KBs now but it recognizes the A1048 KB.

MacPro also recognizes M7803.

MacBook Air is Early 2015 and it recognizes all four KBs.



Question marked as Best answer

Feb 26, 2019 7:24 AM in response to fruit129

The reason I asked is that I sometimes get a message that my keyboard is "not recognized", and it asks me to type a particular key (so it can know the layout). The next message says it can not identify the keyboard.


Then the keyboard proceeds to work flawlessly.


--------

Clearly, you have a FAR more serious problem than my occasional messages.


Apple Keyboards have a reputation of becoming unreliable (maybe as extreme as not being seen by Hardware) when used on a USB extension cable. They also do not support any USB peripherals in the "convenience" USB jacks except an Apple low-power mouse. (I did manage to clobber my numeric keypad when trying to plug a nominally self-powered printer into the "convenience" USB port. I did not notice until my credit card number was entered incorrectly when placing an online order.)

Failure of a keyboard recognition

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