The first step: After the Mac flies we search "keychain Access" found we click to open to enter.
The second step: after the "Keychain access" click on the Left "password" and then click on the "lock-like" icon, enter your password unlocked as shown below.
Step three: Then here we enter the Wi-Fi name of our connection to search for the corresponding password as shown in the following figure.
Fourth step: Found us right-click the Wi-Fi name, select the "Show Introduction" option (here you can also directly double-click the name of the Wi-Fi).
Step Fifth: In the WiFi attribute that pops up, we click the "Show password" check box.
Sixth step: The system prompts you to enter the administrator's password after we click the "Good" button.
The Wi-Fi password should now appear in the text box to the right of "display password."
Keychain Access can be used for many of the side's passwords to find such as browsers, applications, and so on.