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Q: I recently updated to macOS Sierra and the up and down directional buttons on my keyboard doesn't work any more
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Oct 18, 2016 8:48 AMby irina_w,Hello Bernard58,
I see that you recently updated to macOS Sierra and now the up and down directional buttons on your keyboard don't work anymore. I can imagine how that would be annoying, I definitely wouldn't want that to happen to my MacBook.
I think the best place to start for this issue is with some isolation testing. I would like you to try this in safe mode and a new user account to see if you get the same result. Testing in safe mode is a way to start up your Mac so that it performs certain checks, and prevents some software from automatically loading or opening. Testing in another user account allows you to log in as another user to figure out if unexpected behavior is related to a specific user's settings or files.
Please use the following articles for this:
macOS Sierra: Start up in safe mode
How to test an issue in another user account on your Mac
Let us know what happens. We'll help you get through this.
Cheers! -
Oct 22, 2016 7:22 PMby dialabrain,If you tried both methods, starting in safe mode and creaating a new user and neither worked, try resetting the SMC.
Reset the System Management Controller (SMC) on your Mac - Apple Support
