Using Microsoft Wheel Mouse on a Mac - issue with scroll wheel

Posted on 2011-10-29
Last Modified: 2012-05-12
For quite a while I have been using a Microsoft Wheel Mouse on my iMac. In order to do this, a driver must be loaded, and applet then shows up for the Microsoft Mouse in System Preferences. As I said, this mouse has been working perfectly for perhaps a couple of years now.

Recently the mouse has become flaky when I press down on the scroll wheel. I have the wheel button set to bring up the Dashboard. From the beginning, a single press on the wheel would bring up the Dashboard. However, recently pressing on the button is erratic, perhaps taking 10 presses to bring up the Dashboard.

My question: is the mouse simply going bad? Alternatively, is there a way to "clean" the button mechanism to restore operation?
Question by:jasimon9
    LVL 11

    Expert Comment

    by:Scott Gorcester
    I would say that your mouse is going bad, I have a similar problem on a windows machine and its the hardware failing.
    LVL 23

    Expert Comment

    by:Alan Henderson
    If you'd like to take it apart for a cleanout here's a guide:

    and links to more guides:

    A blast of compressed air and maybe a bit of CRC could do the trick.

    LVL 4

    Expert Comment

    I have used rubbing alcohol on a q-tip to clean with as well

    Author Comment

    Probably the mouse is bad as it is quite old. The only thing that is not working is pressing on the scroll wheel. It looks a bit of work for the disassembly, which may not be worth the effort.

    I can either live without that function, or swap with another mouse that I remembered I have. So I am doing that for now.

    However, my specific question is probably best answered by the disassembly guide given by vallis.

    Accepted Solution

    I might have resolved this issue, and it is not the mouse hardware!

    Here is the history of this isssue:

    1. After a while, pressing down on scroll wheel of mouse for Dashboard became erratic.

    2. I swapped for a Targus "mini-mouse," which fixed that Dashboard  problem

    3. But the Targus mouse caused weird drag highlighting.

    4. Switched back to MS mouse, but now scroll wheel caused very great jumps, like about 4 inches of a web page as the smallest move increment!

    5. Also discovered that MS mouse would not allow mouse preference panel that allowed for changing scroll direction, but the Targus mouse did. What a mess!

    6. Finally removed MS Intellipoint driver intending to reinstall it.

    7. But before doing so, verified that smooth scrolling is now working, plus mouse preferences now show the full features of Lion.

    So I will not be reinstalling MS Intellipoint drivers at this time as it is apparently no longer needed for the main mouse functions, and the rest of the features it provides I can live without.

    Very weird!

    If the problems does not return in a few days, I will be accepting this post as the answer.

    Author Closing Comment

    Mouse not bad at all -- apparently a driver conflict with Lion.

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