Arcade v1.4+ and higher is not officially supported on Mac OS 10.9 - 10.11.
Below you will find links for Arcade v1.3 installers. Run the updater if you've had older versions of Arcade installed before. If you haven't had previous versions of Arcade on your machine, use the Full Installer. When downgrading from v1.4+ to v1.3, we suggest fully uninstalling Arcade first, then running the full installer.
Please note that fully uninstalling Arcade will delete the Arcade Content folder along with any User Kits that you may have setup.
As we work on releasing new updates for Arcade, support for these legacy versions may be limited.