Smooth wheel scrolling
Each notch becomes a short glide with natural deceleration. Long pages, code files and timelines read like they do on a MacBook trackpad.
Free & open sourceV4.2.1
Mos for Mac Makes Your MouseScroll Like a Trackpad
A free menu bar app that turns choppy wheel steps into fluid, inertia-based motion. Tune the feel per app, flip direction for the mouse only and map every extra button.
$0Free with no paid tier
20K+Stars on GitHub
12.1 MBUniversal binary
10.13+Minimum macOS
Everything Mos Does for Your Mouse
A standard wheel moves in fixed notches, so pages jump instead of glide. Mos for Mac mouse scrolling reshapes each notch with real physical inertia, then lets you shape the curve, the direction and the buttons around how you work.
Step, speed and duration
Three sliders set how far a notch travels, how fast it moves and how long the glide lasts. Hotkeys add a boost or pause smoothing on demand.
Step 10.00Speed ×1.00Duration 3.75Reverse the mouse only
macOS ties natural scrolling to one switch for every device. Mos flips the vertical and horizontal mouse axes on their own, so your trackpad stays untouched.
Per-app profiles
Give Figma precise steps and Safari a long glide. Any app can inherit your defaults or override scroll and button behavior with its own profile.
Button bindings and Logitech
Record a click, then map it to Mission Control, Spaces, screenshots, scripts or any app. Native HID++ reads Logitech buttons over Bolt, Unifying and Bluetooth.
Safe by design
Mos runs locally from the menu bar with no account, cloud service or remote API. It asks for Accessibility access only, and every line of source sits public on GitHub.
Terminal installation
Advanced users can install Mos with a single Homebrew command.
brew install --cask mos
How to open Terminal on Mac
- 01Press ⌘ + Space to bring up Spotlight.
- 02Type Terminal into the search field.
- 03Hit Return and a shell window opens.
Installation via Terminal command
- 01Click Copy above to grab the cask command.
- 02Paste it with ⌘ + V and press Return.
- 03Mos.app lands in Applications. Launch it and allow Accessibility.
No Homebrew? Install it from brew.sh, or grab the ZIP and drag Mos into Applications.
Download ZIPHow Mos Works After You Open It
Three short steps take you from a jumpy wheel to scrolling that feels like your own.
Allow Accessibility
On first launch, macOS asks to let Mos read wheel events. Turn it on in Privacy and Security, and smoothing starts right away.
Tune the curve
Click the menu bar icon and open Preferences. Adjust step, speed and duration until the mos mouse scroll on your Mac feels right.
Add apps and buttons
Create a profile for any app that needs its own feel. Then record side buttons and map them to Spaces, screenshots or launchers.
Feel the Difference Before You Download
Scroll your mouse wheel over either panel. The left one moves like a stock Mac wheel. The right one runs a Mos-style glide using the sliders below.
Without Mos
rawWith Mos
smoothBrowser preview only. The real app smooths scrolling system-wide in every app you use.
| Option | Best for | Price |
|---|---|---|
| Mos | Smooth wheel scrolling with per-app profiles, axis tuning and button bindings | Free |
| macOS defaults | People already happy with how a stock wheel feels | Built in |
| LinearMouse | Pointer acceleration and broader cursor customization | Free |
| Scroll Reverser | Direction control alone, without smoothing curves | Free |
| Paid scroll tools | Buyers who want commercial support and licensing | Paid |
What Mac Users Say About Mos
Rated 4.8 out of 5 by people who switched their mouse wheel over to Mos.
Mos for Mac mouse scrolling is the first thing I install on a new machine. My Logitech wheel used to jump in chunks. Now pages glide the way they do on the trackpad.
Hamza R.
I wanted natural scrolling on the trackpad and classic direction on the mouse. macOS ties both to one switch. Mos split them in about ten seconds.
Elena V.
Per-app profiles are the hidden win. Figma stays precise while Safari feels silky, and the switch happens on its own when I change windows.
Tom B.
Searched for a mos mouse app for mac after a friend mentioned it. Free, tiny and quiet in the menu bar. No account and no nag screens.
Priya S.
Button 4 opens Mission Control and Button 5 jumps to the next Space. The recorder made binding both of them painless.
Lukas M.
Took me a minute to find the Accessibility toggle the first time. After that, mos mouse scroll on my M2 Air just worked. I only wish the settings window had a search box.
Nora K.
I still had the old Mos DMG from years ago. Version 4 is a different beast with Logitech HID++ support and a full action library. Worth the update.
Diego F.
Wide spreadsheets finally scroll sideways the way I expect. The axis conversion hotkey saves me from reaching for the trackpad all day.
Mei L.
One brew command, one permission prompt, done. Setting up the mos app on my Mac was the simplest utility install I have done this year.
Owen T.
Mos for Mac FAQ
Quick answers about setup, permissions and downloads.
What is Mos for Mac?
Mos is a free macOS menu bar utility by Caldis. It makes mouse wheel scrolling smooth like a trackpad, reverses direction for the mouse only, adds per-app profiles and maps extra buttons to actions.
Is Mos free?
Yes. Mos costs nothing, has no paid tier and needs no account. The source code lives on GitHub under the CC BY-NC 4.0 license.
Which macOS versions does Mos support?
Mos 4.2.1 runs on macOS 10.13 High Sierra or later. It ships as a universal binary, so Apple Silicon and Intel Macs both run it natively.
Is there a Mos DMG download?
Older Mos 3.x builds shipped as a DMG. Version 4.2.1 comes as a ZIP instead: unzip it, drag Mos.app into Applications and launch. Homebrew users can run brew install --cask mos.
Why does Mos need Accessibility permission?
Mos reads raw wheel events and posts smoothed ones back to macOS. If nothing changes after you grant access, uncheck Mos under Privacy and Security, Accessibility, then check it again.
What if macOS blocks Mos on first launch?
Right-click Mos.app and choose Open, or allow it under Privacy and Security. The Mos wiki also lists xattr -d com.apple.quarantine Mos.app for Terminal users.
Can Mos reverse mouse scrolling without changing the trackpad?
Yes. Mos flips the vertical and horizontal wheel axes independently, while your trackpad keeps the natural scrolling setting from macOS.
Does Mos work with Logitech mice?
Yes. Since version 4.2.0, Mos supports Logitech HID++ natively. It picks up buttons from Bolt and Unifying receivers plus Bluetooth connected devices.
Give Your Mouse Wheel a Trackpad Feel
Download Mos free, grant one permission and every app on your Mac scrolls the way it should.