How to set up password policies in OS X
Generally each account on an OS X system is protected with a password; however, the security of a system can be compromised by the use of an insecure password. For example, common passwords like "12345," "password," or "letmein," or short passwords may be easily guessed. Sometimes account holders on a multiuser system may even use a blank password, which can easily let anyone into their accounts. By default OS X will warn users of such practices and recommend strong passwords be used, but ultimately does not prevent users from setting whatever password they want.… Read more