How to change your MAC Password

OSX: 

 
 Choose System Preferences from the Apple menu, then click Users & Groups. 

 Select your username from the list of users. 

 Click the Change Password button, then follow the onscreen instructions. 

 DO NOT wait until you are prompted at the login screen! This will unsync your keychain password, causing repeated prompts to enter it. 

 
   

 Password requirements: 

 
 Must not contain the user's account name or parts of the user's full name that exceed two consecutive characters 

 Must not be one of your last 8 passwords 

 Be a minimum of 8 characters 

 Contain characters from three of the following four categories: 

 Uppercase characters (A through Z) 

 Lowercase characters (a through z) 

 Numbers (0 through 9) 

 Special characters (for example, !, $, #, %)