1.
Choose Create Network from the AirPort status icon in the menu bar. If the icon isn't in the menu bar, choose Apple > System Preferences > Network > AirPort and select the "Show AirPort status in menu bar" checkbox.
2. Give
the network a name and select a channel from the pop-up menu. You may use the default channel 11 but you can also choose any other channel.
转载自:http://www.photosync-app.com/photosync/en/help/connectivity/answers/items/i-am-using-a-mac-computer-i-dont-have-a-wi-fi-network-availablethe-wi-fi-network-i-am-using-is-not-working-how-can-i-create-a-wi.html