I have a 2009 13'' macbook pro and the track pad has basically stopped working. It basically just moves wherever it wants. However, when I plug in a usb mouse, the trackpad interferes with the usb mouse so it is also not very accurate. I went into system preferences and didn't see a way to disable the trackpad and was wondering what i should do. Thanks in advance. Also is this something that could be fixed and how much would it cost. thanks
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How to disable trackpad?
- Thread starter well2thebone
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I believe in sys prefs under mouse? There is a box to check for "disable trackpad when theres a mouse connected" Im not sure if it shows before you connect a mouse. I remember having disabled it myself, but didnt like it that way, but if your trackpad is faulty I suppose its the better option. 
I actually just got this done. It's most likely a swollen battery pressing up on the trackpad. I believe the battery replacement cost $129 + labor (probably around $20. I got my trackpad replaced as well and I think labor total was $41).
If you have an Apple store nearby you can go in and ask and they'll give you the exact numbers.
EDIT: Sorry labor cost $39 total for battery + trackpad. So it'll probably be around $145 total to replace the battery?