Mozart Developer Preview beta is out. Request access →
Mozart
Documentation▾
Getting Started

Install

Get the Mozart desktop app on your machine.

Mozart is a desktop app. Install it once, point it at a Project, and start running Tasks.

System requirements

  • macOS 13 or later
  • Windows 11
  • Ubuntu 22.04+ or a compatible Debian-based Linux distribution
  • Git available on your PATH
  • A Claude Code or Codex account

Download

Mozart is in private beta — request access and we will share a download link once your request is approved.

macOS

Open the .dmg, drag Mozart into your Applications folder, then eject the disk image.

Security warning on first launch

Mozart is not yet code-signed. macOS will block the app the first time you open it with a message like "Mozart.app can't be opened because Apple cannot check it for malicious software."

To get past it:

  1. Open Finder → Applications.
  2. Right-click (or Control-click) Mozart → Open.
  3. A new dialog appears with an Open button — click it.

If that doesn't work, go to System Settings → Privacy & Security, scroll to the Security section, and click Open Anyway next to the Mozart entry. macOS may ask for your password or Touch ID before proceeding.

You only need to do this once. Subsequent launches work normally.

Windows

Run the .exe installer and follow the on-screen steps. Mozart installs to your user folder and creates a Start Menu shortcut.

Browser download warning

Edge and Chrome may flag the file as "not commonly downloaded" and move it to your Downloads folder with a warning. Click Keep (Edge) or Keep anyway (Chrome) to save the file.

SmartScreen warning during install

When you run the installer, Windows Defender SmartScreen may show "Windows protected your PC" because the app isn't signed yet.

To proceed:

  1. Click More info in the SmartScreen dialog.
  2. Click Run anyway.

The installer will continue normally. You only need to do this once.

Linux

Mozart ships as a .deb package for Debian-based distributions (Ubuntu 22.04+).

Install the package

sudo dpkg -i mozart_*.deb

If dpkg reports missing dependencies, run the following to resolve them automatically, then install again:

sudo apt-get install -f
sudo dpkg -i mozart_*.deb

Launch Mozart

After installation, Mozart appears in your application launcher. You can also start it from the terminal:

mozart

Verify the install

After launching Mozart for the first time, open the About menu. The version number shown should match the build you downloaded.