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Disable Scroll Wheel Acceleration

How do I disable my Mouse's Scroll Wheel Acceleration in Mavericks?


Thanks for any help. Just to qualify:


I am not talking about mouse pointer speed acceleration.

I am not talking about my trackpad.

I am not using a Magic Mouse.


I am talking about the amount of lines my screen scrolls when I roll the scroll wheel on my mouse. Currently, if you rotate the wheel fast, it accelerates. Two lines at a time become 20 lines at a time. I don't want that. I want it to always be 2 lines at a time. I want to disable Maverick's built in scroll wheel acceleration.


For example:


When I move my mouse wheel, I can hear it click slightly as it moves to the next position. At a low "Scrolling Speed" as per the Mouse CP option it does about 2 lines per click. Therefore, 10 clicks should equal 20 lines. With acceleration enabled, 10 clicks can be 20 or 50 lines depending on how quickly I spin the wheel. This is what I want to disable. I want 10 clicks to always equal 20 lines regardless of how fast I spin the mouse wheel.


Some additional information:


The "Scrolling Speed" option in the Mouse CP changes the amount of lines the wheel moves, but it does not affect acceleration, which remains constant.

My mouse is wired, not using bluetooth.

My mouse is a logitech mouse, but the problem occurs with 3 other mouse brands as well.

This problem existed under 10.8, but not 10.7 or earlier.

This problem does not exist using Windows via bootcamp.


Thanks for any and all help!

Posted on Oct 30, 2013 1:56 PM

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Question marked as Best reply

Posted on Feb 22, 2017 3:40 AM

After many years of frustration with macOS & wheel mice, I've developed Smooze.


With Smooze you can choose how macOS scrolling & mouse buttons behave.


If disabling the acceleration is what you're after just toggle the "Animate" to Off and you're good to go. You can also set the number of lines you want to move on each tick.


The app is not free but that specific feature is **free and will always be free**.


User uploaded file


http://smooze.co

16 replies

Disable Scroll Wheel Acceleration

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