Entrar no diretório

/System/Library/PrivateFrameworks/Apple80211.framework/Resources

Usar o comando

airport -s

Exemplo:

sh-3.2# ./airport -s

SSID BSSID             RSSI CHANNEL HT CC SECURITY (auth/unicast/group)

GEBE 1c:af:f7:5f:b3:7c -4   9,-1    Y  — WPA(PSK/TKIP/TKIP)

WlanSVdgal 00:21:91:34:39:27 -4   6       N  — WEP