# Disabling Mouse Acceleration in OS X (Leopard)

**URL:** <https://boards.straightdope.com/t/disabling-mouse-acceleration-in-os-x-leopard/457543>\
**Category:** Factual Questions\
**Created:** [July 23, 2008, 9:56pm UTC](https://boards.straightdope.com/t/disabling-mouse-acceleration-in-os-x-leopard/457543 "2008-07-23T21:56:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Lazlo](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lazlo/32/9678_2.png) [@Lazlo](https://boards.straightdope.com/u/Lazlo)\
**Post date:** [July 23, 2008, 9:56pm UTC](https://boards.straightdope.com/t/disabling-mouse-acceleration-in-os-x-leopard/457543/1 "2008-07-23T21:56:24Z")

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OS X’s nasty-ass mouse acceleration has been driving me nuts and I can’t seem to find a solution to it.

Does anyone here know of an easy way to turn off mouse acceleration? I’m hoping for some kind of script or command I can run in a term window that will just shut it off.

Any help would be greatly appreciated. Thanks!

ETA: My version is: Mac OS X 10.5.4

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**Author:** ![Morbo](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/morbo/32/389_2.png) [@Morbo](https://boards.straightdope.com/u/Morbo)\
**Post date:** [July 23, 2008, 10:06pm UTC](https://boards.straightdope.com/t/disabling-mouse-acceleration-in-os-x-leopard/457543/2 "2008-07-23T22:06:23Z")

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If you want to replace your mouse, I’ve found the ones from Kensington work well. They install their own driver that overwrites the OS X acceleration curve problem.

If not, there’s shareware programs out there that will do it. I use [MouseFix](http://www.knockknock.org.uk/mac/).

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**Author:** ![Lazlo](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lazlo/32/9678_2.png) [@Lazlo](https://boards.straightdope.com/u/Lazlo)\
**Post date:** [July 24, 2008, 9:00pm UTC](https://boards.straightdope.com/t/disabling-mouse-acceleration-in-os-x-leopard/457543/3 "2008-07-24T21:00:21Z")

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I tried the app you linked and it took the edge off the acceleration. Thanks.

I have no idea why os x doesn’t have an acceleration slider in addition to the speed slider.