Trackpad issues (none of the other discussions here solved my problem)
Hi everyone and thanks in advance for reading.
I have a MacBook Air 13-inch, Mid 2011 10.10.3 (out of warranty) and I have been struggling with trackpad issues since January 2015 soon after receiving the warning "Battery Service" from my laptop (the messag. Basically, the trackpad behaves erratically, it's often stuck in select position, and makes quite hard to write an entire sentence without moving on its own. You would not believe how much pain this is causing, especially for my work. I thought about the battery, but it actually works fine: At the beginning the troubleshooting was fine and the problem did not occur again until March 2015. In addition to the trackpad issues, the laptop did not connect with the projector (although the adapter was just new) and was not able to open more than 2 files at the same time.
I brought the laptop to a technician, who cleaned it up and said everything seemed fine to him. He suggested to upgrade to Yosemite, which I did. For a couple of days everything was OK, but the symptoms came back again.
I finally resigned and went to a certified Mac reseller (I live in Southern Ireland, and there is no AppleStore here...). They run some tests, saying that the battery failed.
MacBook Air, OS X Yosemite (10.10.3)