"Apple has determined that a small percentage of the keyboards in certain MacBook and MacBook Pro models" may exhibit some malfunctions, such as letters or characters repeating unexpectedly, not appearing, or experiencing "sticky" keys that do not respond in a consistent manner, said the company in a statement. Not only this, but Apple will also be refunding any amount which the customers might have spent on getting their keyboard repaired in this time period.
Ever since Apple made a move to the butterfly keyboard on the MacBook 12-inch a few years, support forums have been plagued by users with sticky or unresponsive keys. Covered computers include the 12-inch MacBook going back to early 2015 all the way up to 2017 models of both 13- and 15-inch sizes of the MacBook Pro. The company has extended the warranty for keyboards for nine affected models released starting in 2015 to four years from the usual one year.
Apple has launched a "Keyboard Service Program" to address issues that some MacBook owners have experienced with their keyboards. The so-called "butterfly" keys allowed for a much lower-profile keyboard with reduced travel distance when pressed.
Indeed, even a single faulty key can demand the whole keyboard be replaced.
While the launch of Keyboard Service Program for MacBook and MacBook Pro should have signalled the end of the issue, we may be hearing more about it in the future. Jason Snell, editor of Six Colors and former editor-in-chief of Macworld magazine, wrote in April 2018, "Apple's relative silence on this issue for existing customers is deafening". But in the meantime, consumers can at least get keyboards that are having problems repaired at no cost-other than some of their time, of course. If there's existing damage which impacts Apple's ability to fix the keyboard, that will have to be fixed first; it may involve a fee to do so. Macbook users with flawed keyboards can head to Apple or Apple Authorised Service Provider to get the keyboard serviced free of charge.
If you own one of the above MacBook, and facing issues with the keyboard, you will have to take it to an authorized service center or an Apple retailer.