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Helpful answers
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Sep 25, 2014 12:10 PM in response to MarieChristinby coander15,First I would recommend taking a look at this article: Trackpad or Magic Trackpad is jumpy or erratic
You may also consider trying an SMC reset: Intel-based Macs: Resetting the System Management Controller (SMC)
Are you using any kind of external mouse, trackpad, or keyboard that would be causing any type of interference? Did you use any kind of cleaning material on your Mac recently?
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Sep 25, 2014 12:34 PM in response to coander15by MarieChristin,Thanks for your answer coander15!
I Checked out the article you recommended but nothing applies. I tried cleaning the trackpad with glass cleaner as they recommend but it didn't help.
I'm not using any external device.
By now I've tried to turn the Mac book off but it didnt help either