Today we’ll take a look at just how easy it is to change a macOS password, as well as how to reset the password if it is lost or forgotten.įirst, let’s look at how to change a password in macOS Sierra. Security experts suggest that passwords be changed on a regular basis to make it harder for those passwords to be guessed or stolen, yet many Mac users go for years using the same passwords. As part of the built-in security of macOS Sierra, users are required to enter a password when logging onto a Mac.