How to delete saved passwords on your Mac computer, either one-by-one or all at once

You may want to delete a saved password on your Mac if you no longer use the account or don't want to have that password on file.
Hosted on MSN

Security keys versus passwords on your computer: Which works better for you?

Kept seeing mention of a security “key” offered on some of my favorite websites—Microsoft, Google, YouTube and Facebook, to name a few. I wasn’t sure if I should use it. How does it work? Is it a real ...