Applications/Utilities. To find the information using that utility, open it, then click on Edit then Find and search for the SSID for the wireless router or click on Passwords under Category in the left pane of the window and look for it in the list you will see.
Double-click on a system or login entry for the relevant wireless network.
Click on the check box next to "Show password" to reveal the password, i.e. the Wired Equivalent Privacy (WEP), Wi-Fi Protected Accesses (WPA), or Wi-Fi Protected Access II (WPA2) key. You will then be prompted for the "login" keychain password. Provide it and click on Allow.
You will then be able to see the WEP/WPA/WPA2 key.
You can also obtain the password/key from a
command-line interface (CLI). e.g. with the
Terminal application also found in the
directory, using the
security command with the
find-generic-password [-h] [-a account] [-s service] [-options...] [-g] [-keychain...] Find a generic password item. -a account Match account string -c creator Match creator (four-character code) -C type Match type (four-character code) -D kind Match kind string -G value Match value string (generic attribute) -j comment Match comment string -l label Match label string -s service Match service string -g Display the password for the item found -w Display the password(only) for the item found
E.g., suppose I wished to find the WiFi password for a router that uses an
SSID of Xanadu, I could use the command
security find-generic-password -ga "Xanadu" | grep "password:".
You will see a window stating "OS X wants to make changes. Type an administrator's name and password to allow this." Provide a username and password with administrator access to the system so that the "System" keychain can be accessed.
When you provide the needed credentials, you will see the password displayed.
$ security find-generic-password -ga "Xanadu" | grep "password:" password: "4255512a"