TIP: This procedure can be used to change wireless credentials, passwords stored in programs, website passwords, etc.

1. Open the Keychain Access app. The best way to do this is by using Spotlight.
   
   
   
   
2. If prompted to manage your passwords in the Passwords app or in System Settings, click Open Keychain Access.
   
   
   
   
   
   
3. If prompted for authentication, use Touch ID or type your user account password.
   
   
   
   
   
   
4. The list of stored credentials will be shown. If Keychain Access is locked, click the lock icon in the top left-hand corner and enter the appropriate credentials to unlock it. To modify an item in the keychain, double-click on its entry in the list shown.
   
   
   
   
5. The attributes for the keychain entry will be displayed. To change the password that is stored, click the checkbox next to "Show password".
   
   
   
   
6. You will be prompted to confirm the access to your keychain if you have not chosen to "Always Allow" this access in the past. Type your keychain password and click Allow.
   
   TIP: The keychain password is normally the same as your user account password.
   
   NOTE: If you want to allow access in the future click Always Allow.
   
   
   
   
7. Your stored password will be displayed. You can update this password so that it is current. Once you have updated the password, click the Save Changes button.
   
   

Outcome

The stored password has been updated in Keychain Access.