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David, Mac Support Specialist
Category: Mac
Satisfied Customers: 1430
Experience:  BSc H.Dip Apple Certified Professional
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My MacBook Air has developed a typing issue, Certain letters

Customer Question

My MacBook Air has developed a typing issue
JA: Just to clarify, how old is your MacBook Air and what operating system are you running?
Customer: Certain letters just produce multiple characters
JA: What troubleshooting have you tried?
Customer: OS X El Captain
JA: The Mac expert can solve this for you. Anything else you want him to know before I connect you two?
Customer: Reinstalled
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Mac Technician about your situation and then connect you two.
Submitted: 11 months ago.
Category: Mac
Customer: replied 11 months ago.
MacBook Air early 2014 build running El Capitan version 10.15.5
Expert:  David replied 11 months ago.

Hi my name is ***** ***** to JustAnswer. I am reviewing your question and will reply ASAP.

Expert:  David replied 11 months ago.

Your issue is with keys on the keyboard producing more than one cahracter when used.

Is this a consistent issue? Do the same keys produce the same multiple characters?

Is it the same in any application? Or is it just one application.

It's something we should be able to fix, just narrowing down the isssue with these questions, thanks for your patience.

Expert:  David replied 11 months ago.


Have you resolved the issue? If not please don't hesitate to get back to me for some help.

Kind regards,


Customer: replied 11 months ago.
I googled and it appears to be a common problem resolved by switching off, turning on, and switching on whilst holding the ALT, CMD, P,&R key until the system tone repeats four times then allow start up. That fix resolved the issue
Expert:  David replied 11 months ago.

That's good to hear, I'm glad you got it fixed.
Have a good day!