Apogee Quartet

Firmware update requires an Intel Mac running macOS 10.15 Catalina or earlier. Download the Apogee Maestro 2 installer from apogeedigital.com/download-files/ under Legacy Product Installers. The firmware updater app is included in the Maestro 2 installer package. On Apple Silicon Macs, use Apogee Control 2 for operation but firmware update must be performed on an Intel Mac.