Magic Trackpad Cursor Jumps or Moves Without the Trackpad Being Touched. Try turning off your Bluetooth mouse or other nearby devices, especially if you find the cursor on your screen jumps or moves without the trackpad being touched. The cursor may also act strangely when the trackpad is touched. The closest I found to a solution was in an old Apple support article from March 2009 (TS1449), but it was through pure luck and MacGuyverism that I figured out my wireless Mighty Mouse was still on, nearby and thought it might be interfering with the signal to/from the Magic Trackpad. Sure enough. Turned it off and the problem instantly went away! Turned it on and the problem came back. Not sure if more distance would make a difference, but I saw no need for both on my desk anyway.