A search box will pop up.
Step 2
punch in the words Keychain Access into the box.
A pop-down box will appear.
Double press the name Keychain Access- Utilities to open it.
Step 3
Within the menu on the upper left named Keychains, choose System.
Find the connection that you want to make changes to in the big list in the center.
choose the internet name to highlight it.
Then smack the i icon at the very bottom which will open an information box about the data pipe.
This field should show the current saved password for the internet.
After this you might need to slide in your administrator user name and password to allow this change.
You will then be able to see the current password.
Step 5
Change the password to whatever the new data pipe password is.
Then click Save Changes.
You also might need to enter/reenter your administrative password so that save the changes and modify the keychain.
Exit out of Keychain Access.
You have now successfully changed the connection password.
check that Airport or WiFi in the lefthand menu is selected.
Click Advanced at the bottom right.
Making sure the Airport or WiFi tab is highlighted, find and hit the internet you wish to update.
press the edit icon that looks like a pencil.
Click OK and exit.
Now you’re able to successfully change the WiFi passwords for a Mac that have already been saved.
