Only recently I wanted to see the wifi password that I had set on my Mac to share it with a friend. I don’t know about you, but I didn’t find this tiny bit of information where I had expected it to be — in the “security preferences”. It was instead in the “Keychain Acess”.
Here’s how you can see your mac password
Open spotlight search (Press Cmd + Space) and type in “Keychain Access“
– From the “Keychains” sidebar panel, select “System”
From the “Category” sidebar panel, select “Passwords”
Now the main window will list all of the wifi networks you have available.
Double click on your network’s name
In the dialog that opens, click on the “Show password” checkbox
Enter your system username/password when prompted.