Fix Reversed Scrolling on Mac with an External Mouse

Introduction

If you've connected an external mouse to your Mac and find the scrolling direction is reversed (scrolling down moves the page up), don't worry! This is a common quirk when using mice designed for Windows on a Mac, but the fix is incredibly simple. Let's dive in!

Understanding Reversed Scrolling on Mac

MacOS has a built-in setting called "Natural Scrolling," designed to match how trackpads work. However, this setting often causes traditional scroll wheels on external mice to work in the opposite way you'd expect.

The Easiest Fix: The Mos App

Mos is a fantastic little utility specifically designed for customizing mouse behavior on your Mac. Here's how to fix the reverse scroll with it:

  1. Download Mos: Head over to https://mos.caldis.me/ and download the Mos app. It's a small and free utility.
  2. Install and Launch: Follow the simple installation instructions and launch Mos.
  3. Reverse Scroll Option: Within the Mos app, you'll immediately see an option to reverse the scroll direction. Toggle it on.
  4. Enjoy Normal Scrolling: That's it! Your external mouse's scroll wheel should now behave exactly as expected.

Why Mos is Great?

  • Simple and Free: Mos is incredibly user-friendly and won't cost you anything.
  • Additional Customization: Mos lets you tweak other mouse settings like scroll speed and even add per-application customizations if needed.

Alternative: Changing Mac Settings

While Mos is the most convenient solution, you can also fix the scroll direction within macOS settings. Go to System Preferences (or System Settings) -> Mouse (or Trackpad) -> and uncheck the "Natural Scrolling" box.

Conclusion

Don't let reversed scrolling ruin your external mouse experience on Mac. With the Mos app, you can restore normal scrolling behavior in seconds.


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