When typing on my MBP's keyboard, it frequently does double inputs, sometimes dropping letters or inserting letters. I've intentionally l eft t he incorrect inputs in this post to demonstrate what it does.
MacBook Pro (2017 – 2020)
Try cleaning the keyboard using the instructions in this Apple article, just make sure to keep the can of compressed air completely upright or you will damage the laptop with cold wet propellant:
How to clean the keyboard of your MacBook or MacBook Pro - Apple Support
If cleaning the keyboard does not help, then you have encountered the dreaded design & manufacturing defects of the Butterfly mechanism used in the 2016 to 2019 laptops. While Apple had a free repair program available, it is now expired for most people since it is only valid for up to four years after purchase.
Tip: Check the condition of the battery. If the battery condition is shown as "Service Recommended", then you can have Apple replace the battery for a lower cost than it would cost to have the keyboard repaired.....the same exact part will be used in the battery repair since the battery is glued to the underside of the Top Case Assembly of which the keyboard is an integrated part. I wouldn't mention the key issue since some techs may focus on that & want to charge for the more expensive repair.
Try cleaning the keyboard using the instructions in this Apple article, just make sure to keep the can of compressed air completely upright or you will damage the laptop with cold wet propellant:
How to clean the keyboard of your MacBook or MacBook Pro - Apple Support
If cleaning the keyboard does not help, then you have encountered the dreaded design & manufacturing defects of the Butterfly mechanism used in the 2016 to 2019 laptops. While Apple had a free repair program available, it is now expired for most people since it is only valid for up to four years after purchase.
Tip: Check the condition of the battery. If the battery condition is shown as "Service Recommended", then you can have Apple replace the battery for a lower cost than it would cost to have the keyboard repaired.....the same exact part will be used in the battery repair since the battery is glued to the underside of the Top Case Assembly of which the keyboard is an integrated part. I wouldn't mention the key issue since some techs may focus on that & want to charge for the more expensive repair.
Apple has a free Keyboard repair program for the 2016 to 2019 laptops which utilize the new & dreaded butterfly keyboard mechanism. This new key mechanism has both design flaws & manufacturing defects which can cause the keys to repeat with a single key press, or a key will not register a key press. Part of the issue is the design defect due to the very tight tolerances where even a small bit of dirt or a crumb will jam up the butterfly mechanism. The manufacturing defect (possibly also a design defect) is the actual key switch which consists of a bubble of plastic which tends to weaken on one side causing the main problem the free repair program is meant to address.
Keyboard Service Program for MacBook, MacBook Air, and MacBook Pro - Apple Support
FYI, here is an Apple article with the current list of the publicly acknowledged free repair programs for various Apple products:
Apple Service Programs - Apple Support
The known key issue can be intermittent. Sometimes it make a difference on how the key is pressed.
I'll have to go out and buy some more canned air. The problem sort of seems to come and go, and I wonder if it's based on how hot the mac is at the time. Right now it's fine and isn't causing any mistypes, but maybe blowing it out with the little bit of air I had left helped.
I'm hoping it's not defective, because I've heard about that issue too. My battery is in fine condition.
Can you elaborate?
2018 MBP Keyboard Double Typing, other erraneous inputs
