Click the Apple menu
Select System Settings
Click Users & Groups
Select your user account
Click Change Password
Enter your current password
Enter your new password
Confirm your new password
Click Change Password
Sign out and sign back in if prompted
Click the Apple menu
Select System Settings
Click Users & Groups
Select your user account
Click Change Password
Enter your current password
Enter your new password
Confirm your new password
Click Change Password
Sign out and sign back in if prompted