I had my keyboard replaced on my MacBook (purchased Jan 2017) because the spacebar was permanently stuck (and was having to use a bluetooth keyboard). This was my third MacBook during that month -- I had many issues with sticking keys and almost got a different model.The first week of June 2018, they wanted $575 for the fix. I couldn't afford it and took it home. The following week or so, they had the program where they would fix this issue for free.
When I got the MacBook home after fixing the sticking spacebar, the cursor started jumping, exactly the same situation as everyone has described here. It has now been brought to the Century City Apple Store, and been taken in (that's where it is now) for repair FOUR times (keyboard was subsequently replaced twice more). The third time they only wiped everything saying they could not replicate the problem (despite having it for two weeks), so it doesn't count towards possibly "looking at alternatives."
The tap to click is off, a mouse has been attached and removed, the Vpram etc has been reset, it's been in safe mode. My sleeveless wrists aren't touching the trackpad. All of the usual issues mentioned here and on other boards. NOTHING HAS WORKED.
Every. single. consultant has said, "I've never heard of this problem before." Now they're going to try and replace a cable inside.
Oh, and the last (fourth) time I picked it up to see if it was working, since it was wiped, I had to reinstall my hard drive, a three-hour process (staying in the store because I could not bear coming back again). Literally, by the second sentence, I typed it was jumping. I spoke to FOUR different "geniuses" including a manager, who said they had to try to repair it again. I actually cried, I was so frustrated.
I desperately need my computer for work, and am on my old Air. I've lost confidence in Apple. I've gone pretty much the entire summer without a consistently working computer/laptop. While everyone has been "nice," no one has done anything about it. I feel like a permanent fixture at the store and at a mall I loathe.
I am NOT trying to get a new laptop. I love the size and I have a special custom ordered skin on it. I JUST WANT IT TO WORK. But, according to them, I am the only person with this "unusual" problem. (But not according to this thread).