Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have Macbook Pro 2009 model. I have been travelling with it in tropics and slowly trackpad performance has gotten worse and worse, to the point it is almost unusable.

The symptoms

  • Mouse pointer movement gets "janky" and it jumps around, not responding to movemements smoothly

  • The trackpad works ok after reboot, even if it was totally unusuable few seconds ago before the reboot, so the software must play its part in this issue

I suspect some kind of calibration issue related to humidy. Maybe trackpad recalibrates itself on every boot, but somehow gets slowly off sync from the calibration during usage?

Any ideas how to further debug the issues? Hardware failure?

share|improve this question
up vote 4 down vote accepted

Each user account has its own trackpad settings.

You can easily figure out if it's a hardware issue or one of your System Preference settings by making a new user: System Preferences/ Users and Groups / hit + for new user.

Log out of your current user account and log into the new (clean) user.

If that helped log out and back into your user account and check any of the settings that can affect trackpad input, including Universal Access.

share|improve this answer

It's a long shot, but have your tried to turn off your "accidental trackpad input"?

enter image description here

share|improve this answer
Did it work out? – Michiel Apr 10 '12 at 7:31
No, it's an hardware issue definitely. – Mikko Ohtamaa Apr 27 '12 at 20:30

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.