Chosen Solution
My Macbook keyboard has suddenly started having problems. the “enter” key, the ‘p’, and the numbers don’t respond at all. the ‘=’ key works but also adjusts the keyboard backlight for some reason. mouse keys are not enabled. any ideas of what could cause this short of replacing keyboard. i had been in a humid area for several days and it worked fine there but wasn’t working when i got home Update (08/11/2018) there are possibly other keys i haven’t realized yet are not functioning or functioning improperly but those are what i’ve noticed
First run a “Paid For” anti-virus like Symantec Endpoint protection. This failing you will need to replace the keyboard or the uppercase: MacBook Pro 13" Unibody Mid 2012 Upper Case Replacement https://www.youtube.com/watch?v=UYW1xgUe…
Kindly go through the following knowledge base article: macOS Sierra: If keys on your keyboard don’t work
