Disable mouse acceleration with this one weird trick.

## Acceleration

### Disabling

    defaults write .GlobalPreferences com.apple.mouse.scaling -1

Note: Log out to take effect. If you change Tracking Speed under System Preferences, it will undo this fix. Only affects the mouse, not the trackpad.

### Re-enabling

Under System Preferences → Mouse, change Tracking Speed.

### Trackpad acceleration

    defaults write .GlobalPreferences com.apple.trackpad.scaling -1

Works the same way, but only affects trackpads.

## References

- Disabling mouse acceleration (stackoverflow.com)

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