How to Disable Wi-Fi SSID broadcast on an Apple AirPort
How to disable Wi-Fi SSID broadcast on an Apple AirPort in seven simple steps. Open your AirPort Admin Utility application. Find your network's name and double-click it or press the Configure button on the bottom right of the screen. Enter your password and click OK. The Configure "Apple AirPort Express" Base Station should open. Click on AirPort tab. Select the "Create a closed network" check box. Click OK on the dialogue box. Click the Update button on the lower right part of your screen.