Mos for MAC
Free tool that makes mouse-wheel scrolling on your Mac as smooth as a trackpad, with separate scroll directions and button mapping.
Mos Overview
Mos makes scrolling with a mouse wheel on your Mac feel as smooth as a trackpad, while keeping the precision of a mouse. On macOS a mouse wheel often scrolls in abrupt jumps; Mos intercepts the wheel events and turns them into smooth, continuous movement. It also lets you set the scroll direction for the mouse separately from the trackpad, so you can keep natural scrolling on one and not the other. Mos is a small menu bar app made by Caldis and loved by more than 21,000 people who starred it on GitHub.
Mos is free, and its source code is published on GitHub under the CC BY-NC 4.0 license. It runs on macOS 10.13 or later. On first launch, macOS asks you to give Mos Accessibility permission, which it needs to read and rewrite scroll events. Besides scrolling, newer versions can remap mouse buttons, including the buttons of Logitech mice.
Key Features
Mos gives you full control over how your mouse scrolls.
- Smooth scrolling: tune step, gain and duration, or turn on the simulate-trackpad mode.
- Independent axes: set smoothing and reverse direction separately for vertical and horizontal scrolling.
- Separate directions: reverse the mouse wheel without changing the trackpad.
- Scroll hotkeys: hold a key to speed up, switch axis, or turn smooth scrolling off for a moment.
- Per-app profiles: let each app follow the global settings, or give it its own.
- Button bindings: bind mouse buttons to shortcuts, system actions, apps, scripts or files.
- Action library: built-in actions for Mission Control, Spaces, screenshots, Finder and more.
- Logitech support: use the buttons of Logitech mice on Bolt, Unifying and Bluetooth connections.
What’s New in Version 4.2.1
Mos 4.2.1 fixes a performance problem; it follows Mos 4.2, which added several new features.
- Fixed a performance issue in some cases caused by input checks for app hotkeys
- Native Logitech HID++ support for Bolt, Unifying and Bluetooth devices (4.2)
- New "Open…" button action that launches apps, runs scripts or opens files (4.2)
- Scrolling can now be bound to any custom key (4.2)
Mos FAQ
Is Mos free?
Yes. Mos is free, and its source code is published on GitHub under the CC BY-NC 4.0 license.
What does Mos do?
It smooths mouse-wheel scrolling so it feels like a trackpad, lets you set the scroll direction for the mouse separately, and can remap mouse buttons.
Can I reverse the mouse scroll direction without changing the trackpad?
Yes. Mos reverses the mouse wheel on its own, so you can keep natural scrolling on the trackpad and the classic direction on the mouse, or the other way round.
Which macOS version does Mos need?
Mos runs on macOS 10.13 High Sierra or later.
Why does Mos ask for Accessibility permission?
Mos needs Accessibility permission to read and rewrite scroll events. Grant it in System Settings › Privacy & Security › Accessibility when macOS asks.
Mos does not work after granting permission. What can I do?
The Mos wiki on GitHub has a page called "If the App not work properly" with steps for permission problems; removing Mos from the Accessibility list and adding it again often helps.
Can I use different settings for different apps?
Yes. Per-app profiles let an app follow the global settings or use its own scroll, shortcut and button settings.
Does Mos work with Logitech mice?
Yes. Since version 4.2 Mos supports Logitech HID++ and can use the buttons of mice connected by Bolt, Unifying or Bluetooth.
Can I install Mos with Homebrew?
Yes. Mos is available as a Homebrew cask: brew install --cask mos.
Where does the Mos download on mos.FULLMAC.app come from?
The download button leads to the official Mos website at https://mos.caldis.me/, which links to the releases on GitHub. mos.FULLMAC.app does not change or repackage the app.
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