Hi. I have a problem with my macbook pro and wonder if anyone here can help me. The problem is that the computer mouse /trackpad suddenly jumps around. It starts marking, pressing wildly everywhere, switching windows etc without me doing anything. Read that it could be because the battery ran out so ordered a new battery, opened it up and saw that the old one did not bump or show signs of swelling. Still changed battery since the battery cycle was at 2106 (Limit is a 1000 so it went a lot over maximum). Opened the mac and used it with the hope that the problem was resolved, but after 20 minutes it started to jump around again. I don't know what to do. Not interested in spending money sending it on service because it's 8 years old. It works fine besides the hang ups so sad to see it go. Anyone That can help a desperate mac owner who doesn't want to spend 1.499$ on a new mac?