Install

No App Store and no account — download and drag, or use Homebrew.

Homebrew

Homebrew
brew install --cask getgantry/tap/gantry
xattr -dr com.apple.quarantine /Applications/Gantry.app

Manual download

  1. Grab the latest .zip from Releases and unzip it.
  2. Move Gantry.app into /Applications.
  3. Gantry isn't notarized yet, so right-click the app and choose Open the first time, or clear the quarantine flag:
Clear the quarantine flag
xattr -dr com.apple.quarantine /Applications/Gantry.app

Updates

Gantry checks for updates automatically (via Sparkle) and can install them in place. You can also re-run the Homebrew command above.

Note
Gantry runs as both a normal window app and a menu-bar item. You can hide the Dock icon and keep just the menu bar from Settings → General.