I have a 2010 Imac computer running Mac OS Sierra (10.12). Al of a sudden my cursor is bouncing all over the screen, highlighting everything, deleting things in my email. It just seems like someone has control of my computer moving the cursor. If I have a certain webpage up and just watch the screen, I will see the Cursor jumping, highlighting text on its own. I was using a trackpad and tried a wireless mouse and have had the same result. Please Help.
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Imac computer almost unusable with Erratic Cursor!
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