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My trackpad is misbehaving, it randomly interprets clicks as swipes and the cursor jumps around or lags on the screen.

How can I find out if this is a hardware or software issue?

I'm on a MacBook Pro 5,3 with OS X 10.11.6. Using a bluetooth mouse (Logitech MX Master) I see none of these issues.

Steps taken

  • Restart - solves the problem for a few minutes, but symptoms return
  • Different user - same as restart
  • Apple Hardware Test - pressed D during startup, but the hardware test did not start and the machine started in normal mode.

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