Authored by: Support.com Tech Pro Team
Every password you've entered and saved on a Mac is stored in Keychain Access, the password management system for MacOS. And that includes Wi-Fi network passwords.
To start, use the search feature to open the Keychain Access app and do the following:
The password field will then show the password you used to log in to that Wi-Fi network. You can double-click in the password field to select the password and copy it to your clipboard if needed.