Need to tell a friend your Wifi password but can’t remember what it is or can’t be bothered to trek to the router? Welcome Keychain access. – this little app, that comes with your Mac, knows all.
1. Navigate to your Applications folder > Utilities and open up the Keychain Access application.
2. Search the name of your Wifi network. You should see a list of matching results in the main part of the window. Double click on the one that matches the name of your Wifi network. A small popup will appear.