Chosen Solution
My MacBook Air’s “z” key acts like it’s stuck or being held down, basically inserting z’s whenever I try to type anything. BUT it’s not constant, and I can sometimes get a few minutes of typing in before it starts going crazy. So I finally replaced the keyboard altogether, and it was fine for a few hours and then started doing the same thing. Desperate here…
Try Changing the keyboard to a Canadian layout then switch it back to US and see if it helps.
