1. Turn off wifi on your macbook from the Mac OSX terminal command line: networksetup -setairportpower en0 off 2. Turn on wifi on your macbook from the Mac OSX terminal command line: networksetup -setairportpower en0 on 3. List available wifi networks from the Mac OSX terminal command line: /System/Library/PrivateFrameworks/Apple80211.framework/Versions/A/Resources/airport scan 4. Join a wifi network from the Mac OSX terminal command line: networksetup -setairportnetwork en0 WIFI_SSID_I_WANT_TO_JOIN WIFI_PASSWORD 5. Find your network interface name: networksetup -listallhardwareports