Mos
Free macOS menu bar utility that smooths mouse wheel scrolling and remaps mouse buttons.
- Verified facts
- 5 of 5
- Alternatives ranked
- 3
- Approved reviews
- 0
- Visits sent from here
- 0
About Mos
Mos makes a regular mouse wheel scroll on a Mac with the smooth, momentum-style feel of a trackpad. It intercepts wheel events and turns the coarse steps into interpolated motion, with sliders for step size, speed and duration. Vertical and horizontal scrolling can be smoothed and reversed independently, so you can keep natural scrolling on the trackpad while flipping it for the mouse. Each app can inherit the global settings or get its own profile, which helps when one app feels better without smoothing. Newer versions also bind mouse buttons to actions such as Mission Control, switching Spaces, shortcuts, scripts or opening apps, and they support Logitech buttons over Bolt, Unifying and Bluetooth. Mos runs from the menu bar on macOS 10.13 and later and installs from GitHub or Homebrew. It is free; its source is public on GitHub under a CC BY-NC 4.0 licence, which allows non-commercial reuse but is not an OSI open-source licence. It needs the Accessibility permission to rewrite scroll events.
Best for: Mac users with a non-Apple mouse who find wheel scrolling jerky or want separate scroll directions.
Pros and cons
What works
- Trackpad-like smooth scrolling for any wheel mouse
- Separate scroll direction for mouse and trackpad, per axis
- Per-app profiles and mouse button bindings
- Free, with support back to macOS 10.13
Why people leave
- Licence is non-commercial (CC BY-NC), not true open source
- Needs Accessibility permission to work
- macOS only; no pointer acceleration controls
Top Mos alternatives
See all 3- 1
Karabiner-Elements66.5Free, open-source input remapper that handles mouse buttons and scroll direction with deeper rules.
- 2
BetterTouchTool62.6Paid app with extensive mouse button and gesture customisation, if remapping matters more than smoothing.
- 3
Hammerspoon50.3Free Lua automation that can intercept scroll and mouse events, for people who want to script their own behaviour.
Why people left Mos
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Reviews
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Mos: common questions
Is Mos free?
Yes, Mos is free to use.
Is Mos open source?
No, Mos is not open source. Open-source alternatives include Karabiner-Elements and Hammerspoon.
What platforms does Mos run on?
Mos is available for macOS.
What are the best alternatives to Mos?
The highest-ranked Mos alternatives right now are Karabiner-Elements, BetterTouchTool and Hammerspoon. See the full ranked list for pricing, platforms and verified facts.