Open the Keychain Access app. Click the password entry and press delete on your keyboard.

If you no longer want a website to remember your password, you can delete the password from the keychain where it is stored.

1) Open the Keychain Access app. One way to do this is by going to Launchpad, going to the Other folder, and clicking Keychain Access.

2) Click once on the desired item to select it. Then, press the delete key on your keyboard.

3) Click Delete to confirm.

OUTCOME

The item that you chose will be deleted.

NOTE: If you are using iCloud Keychain, the item will also be deleted on all of your devices signed in to iCloud, such as your iPhone.