MacBook keyboard not working

12kch Said:

"MacBook keyboard not working: Some keys are not registering. They press like normal but don’t show up on screen. I can’t log in to the MacBook because my password uses some of those letters"

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Troubleshooting Inoperable Keys:

What to Try:

A. Reset the SMC and NVRAM:

(Applies to Intel-Only Macs): Sometimes changes(i.e. formats) are made to the system and then settings (i.e. for Keyboard) become manipulated, technically.  So, reset both on your Mac. Perhaps the keyboard's settings for it keys are mingled. It might take upto three tries to reset both. So, be certain you have the time to do so.

B. Use An External Keyboard:

If using the builtin keyboard does not work properly, then use an external keyboard so do so. It doesn't have to be Apple brand. You might need this adapter: USB-C to USB A Adapter - Apple

or...

C. Boot in to Safe Mode:

In Safe Mode, login items do not run, and corrupt system files(i.e. caches) are intentionally reset as a way to fix issues. So, boot into it, seeing if you then use this. For instructions, go here: How to Use Safe Mode on your Mac - Apple Support

Perform the Following:

1. Boot: in to Safe Mode: [Hold Down: the shift key upon boot].
2. Log in: as same user
3. Wait: 30 seconds
4. Restart; your Mac
5. Log in: as same user

See if this now works

12kch wrote:

Some keys are not registering.

Can you tell us which ones? If 789uiojkl it's an Accessibility preferences problem, Mouse Keys turned on by mistake.

Try pressing the option key 5 times.