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Some keys on my keyboard are not working. This issue started after I was messing around in system preferences, and it only affects the User with which I made preference changes. If I switch to a Guest User account on the same computer all keys work. Can you tell me what setting I changed to make this happen.Only certain keys do not work, like the M and L key for example.
Using a MacBook Pro TouchBar, macOS Sierra, Version 10.12.5 (16F73)