How to uninstall Mos on Mac

Mos is a small menu bar utility that makes mouse scrolling smooth and can reverse it, with vertical and horizontal scrolling set separately and per-app settings. It keeps no documents and no account, only a preferences file and a temporary cache, so the only thing worth saving is your settings if you plan to reinstall. This guide covers the official download from Mos's GitHub releases and the Homebrew cask mos.

Quit Mos and remove the app

  1. Click Mos's icon in the menu bar and quit it.
  2. In Finder's Applications folder, move Mos to the Trash.

Where its data lives

Location What it holds What to do
~/Library/Preferences/com.caldis.Mos.plist Mos's settings Selected by default. Note your smoothing and direction settings first if you plan to reinstall.
Mos's temporary cache under /var/folders Scratch files macOS keeps for the running app Selected by default

Check the result

pgrep -il mos
launchctl list | grep -i caldis
ls -l ~/Library/Preferences/com.caldis.Mos.plist
  • No output from pgrep means Mos is not running. The match is case-insensitive and can catch other processes with "mos" in their name, so check the process name if something is listed.
  • No output from launchctl list means no Mos background job is loaded. The recorded test found none for Mos, so this is normally empty.
  • ls -l printing "No such file or directory" means the preferences file is gone. A listed file means it is still there.

If you installed it with Homebrew

The mos cask's zap list holds a single path, ~/Library/Preferences/com.caldis.Mos.plist, the same file Mole selects by default. While that row stays ticked, nothing in the zap list is left unreviewed, so Mole can remove a Homebrew install of Mos with --zap. Untick it and Mole leaves --zap out and keeps the file.

Running the zap step yourself deletes the preferences file whatever you ticked in Mole:

brew uninstall --cask --zap mos

To keep the preferences file, remove only the app:

brew uninstall --cask mos

What Mole lists

For Mos installed from the official download:

  • ~/Library/Preferences/com.caldis.Mos.plist is selected by default.
  • Mos's temporary cache under /var/folders is selected by default.

For a Homebrew install, the zap list names only the preferences file above.

What this test covered

On September 19, 2026, Mos was copied from the official download into Applications, opened, and removed with a Preview build of Mole 1.15 (build 277); there was no Homebrew receipt. Mole found only the preferences file and the temporary cache, both selected by default, and both went to the Trash with the app. Per-app settings, launch at login and the Homebrew cask were not tested.