OS X Mountain Lion: Join a Wi-Fi network
You can join a Wi-Fi or other wireless network if you have an AirPort Card installed in your computer and you’re in range of the wireless network.
- Choose Apple menu > System Preferences, Network, and then select Wi-Fi in the network connection services list.
If Wi-Fi isn’t in the list, and you’re certain you have an AirPort Card in your computer, click Add (+), and then choose Wi-Fi from the Interface pop-up menu. Give the Wi-Fi service a name, and then click Create.
- Choose a network from the Network pop-up menu. Enter a password if required.
To join a closed network, choose Other, and then type the network name.
You can also use the Wi-Fi icon in the menu bar to join a Wi-Fi network.
You don’t have to select the Wi-Fi network each time you start up or wake your computer.