Selecting Wireless Network Settings in OS X
Before connecting to the projector, select the correct wireless network in OS X.
Click the AirPort icon on the menu bar at the top of the screen.
Make sure AirPort is turned on, then do one of the following:
If your projector is set up on an existing network (Advanced mode), select the network name (SSID).
If your projector is configured for Quick mode, select the projector's SSID.
Wireless Network Projection