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  1. #1


    Member Since
    Jun 05, 2014
    Posts
    3
    erratic unruly cursor
    Random cursor does not follow the track pad or mouse. Erratic lurching about the screen. Odd behaviors include zooming in and out. Yellow highlights of random words on both web pages and text documents. I have purchased a new mouse and avoid any RF devices that could interfere with the internal electronics. I'm on a deadline for completing a script for a live radio broadcast. I see numerous people have posted the same problem but though there are many theories and solutions proposed I have not been able to duplicate a successful fix. Help.

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,479
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    What kind of Mac: year and model? If it's a portable Mac (MacBook, MacBook Pro, etc), open it up and check the battery to see if it has swelled. A battery that has swelled will cause erratic jumping about on the screen as it pushes up on the trackpad. Only cure is to change out the battery for a new one.

  3. #3


    Member Since
    Jun 05, 2014
    Posts
    3
    It's a fairly new MacBook Pro 2012 OS X 10.8.5 with no removable battery

  4. #4

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    34,824
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by betterbadnews View Post
    It's a fairly new MacBook Pro 2012 OS X 10.8.5 with no removable battery
    FYI...thread was posted in the "Desktops" area. When I first read your post (a while ago)...I assumed you had a desktop computer. Since you have a "MacBook Pro"...this opens up other possibilities as far as a solution (since laptops/notebooks have a builtin trackpad...and desktops don't).

    Also...this thread is about a notebook computer...the thread should have been posted in the "Notebook" area (right below the "Desktop" choice). Thread has been moved.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  5. #5


    Member Since
    Jun 05, 2014
    Posts
    3
    Erratic Unruly Cursor
    Random cursor does not follow the track pad or mouse. Erratic lurching about the screen. Odd behaviors include zooming in and out. Yellow highlights of random words on both web pages and text documents. I have purchased a new mouse and avoid any RF devices that could interfere with the internal electronics. I'm on a deadline for completing a script for a live radio broadcast. I see numerous people have posted the same problem but though there are many theories and solutions proposed I have not been able to duplicate a successful fix. MacBook Pro 2012 OS X 10.8.5.

  6. #6

    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    34,824
    Specs:
    2011 13" MBP 2.3ghz, 8gig ram, OS 10.8.5
    Quote Originally Posted by betterbadnews View Post
    Random cursor does not follow the track pad or mouse. Erratic lurching about the screen. Odd behaviors include zooming in and out. Yellow highlights of random words on both web pages and text documents. I have purchased a new mouse and avoid any RF devices that could interfere with the internal electronics. I'm on a deadline for completing a script for a live radio broadcast. I see numerous people have posted the same problem but though there are many theories and solutions proposed I have not been able to duplicate a successful fix. MacBook Pro 2012 OS X 10.8.5.
    It is not necessary to start a 2nd exact same thread for this topic. Threads merged.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  7. #7

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    21,987
    Specs:
    Imac 27" Retina 5K, 512GB Flash Storage, 3.3Ghz, 16GB memory, OS X.11.5.
    How long since you have rebooted? Next question how long since Permissions have been repaired? Do you use Onyx for maintenance chores - best recommended here?
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  8. #8

    cradom's Avatar
    Member Since
    Feb 14, 2004
    Location
    Groves, Texas
    Posts
    4,528
    Specs:
    21in. iMac 10.11 --- HP win 10
    Do you have an external monitor connected? Is it on? If not that can cause those type of problems.
    Delusions are often functional. A motherís opinions about her childrenís beauty, intelligence, goodness, et cetera ad nauseam, keep her from drowning them at birth.
    -Lazarus Long

  9. #9


    Member Since
    Oct 15, 2009
    Location
    Taylorsville, Utah
    Posts
    32
    Specs:
    iMac 27" 5K, ElCapitan 10.11.3, Airport Extr, 15" MacBook Pro, Mavericks, 10.9.3, iPad 3, iPhone 6S
    I had a similar problem. My Magic Mouse with my MBP 15" 2011 vintage would not behave. The curser would not move normally horizontally, just vertically when using the mouse. It would move normally with the track pad on the MBP. I use a 24" external monitor and an external wireless keyboard. The batteries in the Magic Mouse were new. I went to System Preferences and ran through the mouse settings. All looked normal. So, I rebooted the MBP (Mavericks 10.9.3) and the mouse started to behave normally. Haven't seen that problem again. I really thought my Magic Mouse was bad. Working fine now. Sometimes just rebooting will fix lots of things.

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