Erratic trackpad fixed temporarily with external mouse

I've been having issues with the trackpad on my Mid 2012 MacBook Pro lately, where it acts erratic and goes from jumping around, to staying completely still, to clicking things that I never meant to. There aren't any updates for my laptop either, as I currently have what I believe to be the most recent installment of Yosemite, and my computer is not notifying me of any possible change.
I've had this issue occur before but on a lesser scale, and I was able to fix it by simply going to the trackpad system preferences, unchecking everything, and then rechecking everything. This time, however, that method's only worked for about five minutes or so before it went back to acting strange. Eventually, I found an old Logitech plug-in mouse that I've been using so far, and I've discovered that when it's plugged in the trackpad works just fine, so I took out the mouse and the trackpad began working for about twenty minutes before it acted up again. So, again I plugged in the mouse, but this time, the trackpad worked in spurts where it would be fine one minute and act up the next. I've also shut down my computer entirely and waited anywhere from a few minutes to overnight completely, which would once again fix the issue for the first ten minutes of use once I turned it on before it began going haywire.
Any help would be appreciated as I'm totally lost with this. It might be a while before I can carve out some time to visit an apple store myself, so if I could get this fixed on my own that would be wonderful. Also, apologies if this was placed in the incorrect community/category. Thanks in advance (:

Jumpy Trackpad
http://support.apple.com/kb/TS1449
Go step by step and test.
1. Restart
2. Shut down the computer.
    Clean the trackpad with moist not wet microfiber cloth.
    System Preferences > Point & Click
    Try turning off three finger dragging and then turning it on after  testing.
3. Is there any Bluetooth device nearby with failing batteries? If so, replace the batteries.
  4. Reset PRAM:   http://support.apple.com/kb/PH14222
5. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
6. Close all windows and quit all applications.
    Click the Spotlight -the magnifying glass icon- in the menu bar. Enter Disk utility in the box.
    Select Disk Utility. When the Disk utility window opens up,
    select  Macintosh HD, then First Aid.
    Click Repair Disk  Permission
    Ignore the  time remaining estimate.
    Last 1 minute may take longer.

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    ==
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    ==
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    ==
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    Greetings.
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    It could be a coincidence, but I rebooted the machine and (knock on wood) PSE13 seems to be working ok.

  • The cursor on my iMac freezes, and I cannot do anything unless I unplug the computer. It is NOT a problem with the mouse or the keyboard ... it is internal. How do I fix this??

    The cursor on my iMac (Panther 10.3.9) freezes to where I cannot do anything unless I unplug the computer. It is NOT a problem with the mouse or the keyboard. How do I solve this problem?

    ClassicII wrote:
    Sorry to say but your imac g5 logic board has bad caps. This was a problem apple had and issued a out of warentee fix but that has now expired.
    The cost to get this repaired is more than what you could find another used imac for.
    I would suggest you get some details before you rush to make a diagnosis. You have absolutely no information to base this on. I see you're hitting up on numerous threads all over the place. Quality, meaning several good posts with reliable advice, is much more worthwhile than quantity.

  • HT4288 Hand writing Chinese with Magic Mouse? OR Trackpad only?

    I am using an iMac with Magic mouse and I could not find the Handwriting Chinese function! Do I have to get a trackpad to enable the hadwriting function?
    If yes, Can I have both magic mouse and the trackpad working at the same time?

    snowmx wrote:
    Do I have to get a trackpad to enable the hadwriting function?
    Yes.
    http://support.apple.com/kb/HT4288

  • My mouse and trackpad arent responding the click on finder, i can use multitouch but not 1 touch. Aswell when i go to the findertab at the bottum with the mouse, app icons Does Not expand.

    My trackpad is responding the click on finder, i can use multitouch but not leftclick/1 click/touch. Aswell when i go to the findertab at the bottom with the mouse, app icons Does Not expand. I had no problems with it before, but I'm very confused.

    Not using any mouse pad, I have a very smooth desktop. But I just tried to use a sheet of A4 printing paper, but no result, the problem persisted.
    Someone on this forum suggested, that USB3 may interfere with the magic mouse.
    I have 2 LaCie HDD's about 70 cm away from the mouse, I use them on Thunderbolt. But in operation or not - the result is the same, the mouse plays up! Just now I was clicking the desktop and the mouse created a new folder!!
    Thanks for the advice, Bee
    Cheers, Gerd

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