Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

The mouse section of the OS X version 10.8.2 system preferences has 10 different tracking speeds for my mighty mouse.

Unfortunately, the 4th fastest option is too slow for me, and the 3rd fastest option is too fast for me.

I've recently converted from a 21.5 inch iMac to a 27 inch iMac and I cannot recreate the mouse speed I've been used to.

How can tune my mouse's tracking speed, beyond the speeds available in the system preferences?

share|improve this question
up vote 3 down vote accepted

You can adjust the tracking speed on the command line through the Terminal:

defaults write -g x.x

Where x.x is the tracking speed, 5 being the high and 1 being low, e.g.:

defaults write -g 3.5

To reset it to defaults, use:

defaults delete -g

And it should reset back to the default tracking speed. Play around with the increments and see if that's fine-grained enough to find the tracking speed you want.

share|improve this answer
Excellent, thanks. A speed of 3.1 is just right for me. – Randomblue Mar 1 '13 at 16:30
Note: I believe a log off/on or restart is required for this setting to be acknowledged and used. – HaggleLad Mar 7 '13 at 10:07

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.