Cleaning out under the keys could solve the problem.This is likely if you have a habit of eating while using your Mac. When certain Mac keyboard keys aren’t working, it could be caused by dust and other junk underneath them. Here are a few common ways to fix Mac keyboard issues: But there are some common fixes for Mac keyboard problems, which might be exactly what you’re looking for. And the problem is even worse if your MacBook keyboard isn’t working because you can’t just replace it with a new one. You can’t write any documents or type into your web browser. If your Mac keyboard stops working, it’s almost impossible to do anything useful with your Mac.