Casky

Install and update apps and command-line tools from Homebrew and the Mac App Store. Save what's installed as a setup and apply it on another Mac, or export it as a Brewfile, an Ansible playbook or a nix-darwin flake.

Download for Mac Requires macOS 26 or later

GhosttyInstalled from Homebrew

Updates95 available

XcodeInstalled from the App Store

flake.nixExported

SetupApplied

postgresql@17Runs at login

Features

Updates

Everything with an update in one list: Homebrew apps and tools, App Store apps, and apps that update themselves. Update all of them or just the ones you pick, and keep any app on the version it's on.

Kits

Lists of apps grouped by use, such as development, design and AI. You can make your own.

Setups

A setup is a list of what a Mac should have: apps and tools, Homebrew services, VS Code and Cursor extensions, npm, pipx, uv and Cargo packages, dotfiles and Mac settings. Apply it and Casky goes through each step, with a log for each one.

Install 41 apps and tools
Start postgresql@17
Add 12 VS Code extensions
Install 6 npm and uv packages
Link dotfiles
Apply Dock and Finder settings

Package rules

Keep a package updated, hold it at its current version, or remove it. Replace one formula with another, such as node with node@22.

Dotfiles and defaults

Links or copies files from a Git repository and backs up the files it replaces. Sets Dock, Finder and keyboard preferences, or any defaults key.

Services

Starts and stops Homebrew services, and sets which ones run at login.

Command line

casky apply work.casky.json applies a setup from Terminal. --dry-run lists the steps first.

iCloud Drive

Keeps your setups and kits in iCloud Drive, so they show up on every Mac you use.

Clean Up

Removes old versions, cached downloads and dependencies nothing uses, and tells you how much space you'll get back before it starts.

Compare

Each setup shows what this Mac is missing, and what this Mac has that the setup doesn't. Add the extras to the setup if you want them.

Menu bar

Shows when updates are waiting and runs Update All. Casky checks every few hours and can notify you.

Updates itself

New versions of Casky install from inside the app.

Installed

Everything Homebrew and the App Store put on this Mac, in one list. Uninstall from there, from any list, or with ⌘⌫.

Installs side by side

Downloads everything first, all at once. App Store apps, editor extensions and packages install alongside Homebrew instead of waiting their turn.

Quick Look

Press Space on any app or tool for its version, license, popularity and the commands it adds.

Exports

Export a setup as a Brewfile, an Ansible playbook, a nix-darwin flake, or a .casky.json file to import on another Mac.

flake.nixnix-darwin

homebrew = {
  enable = true;
  onActivation.upgrade = true;
  brews = [
    "git"
    { name = "postgresql@17"; start_service = true; }
  ];
  casks = [
    "ghostty"
    { name = "slack"; greedy = true; }
  ];
  masApps = { "Xcode" = 497799835; };
};
system.defaults.CustomUserPreferences = {
  "com.apple.dock" = {
    autohide = true;
    tilesize = 48;
  };
};

setup.ymlAnsible

# ansible-galaxy collection install community.general
- name: "Install apps"
  community.general.homebrew_cask:
    name: [!unsafe "ghostty", !unsafe "slack"]
    state: present

- name: "Set Automatically hide and show the Dock"
  community.general.osx_defaults:
    domain: !unsafe "com.apple.dock"
    key: !unsafe "autohide"
    type: bool
    value: true
  notify: "Restart Dock"

Download for Mac

Needs macOS 26 or later.