Install Runway

Runway is not notarized by Apple yet, so macOS asks you to confirm the first time you open it. It takes one extra step, once.

macOS

Download Runway for Apple Silicon (M1 and newer) or for Intel Macs.
Open the .dmg and drag Runway to Applications.
Open Runway from Applications. macOS says it cannot verify the developer. Click Done (or Cancel).
Open System Settings → Privacy & Security, scroll down to the message about Runway and click Open Anyway. Confirm with your password.

On macOS 14 and earlier you can instead right-click Runway in Applications and choose Open.

Prefer the terminal? This removes the download flag from Runway only:

xattr -dr com.apple.quarantine /Applications/Runway.app

Windows

Download the installer. If SmartScreen shows "Windows protected your PC", click More info → Run anyway.

Linux

AppImage: run chmod +x Runway-Linux-x86_64.AppImage, then open it.
.deb for Debian and Ubuntu, or .rpm for Fedora.

Why the warning?

Apple charges a yearly fee to notarize apps. Runway is a small independent tool; notarization is planned once sales cover it. The app runs entirely on your computer and only contacts our server to activate a license.

Stuck? Write to support@runway.app.br.