My Macbook started doing this annoying little trick the other day…
Whenever I clicked any of the modifier keys (fn, control, option, or command), they’d display on my monitor and make a little sound effect. And if you held them down too long, they’d “lock” and then you had to hold it down again to “unlock” again.
Annoying. So I looked for a solution on Google. However, any search option I tried was giving me millions of answers to questions I hadn’t asked.
Finally, I found a solution. Sticky Keys. It’s in your system settings. Click on the apple at the top left, then System Properties, then Universal Access, then the Keyboard tab, and turn that damn Sticky Keys option off.