Mac will not print after password change / Held for authentication.
You've been printing successfully but jobs are getting held in the queue and not being sent to the printer. You see "held for authentication."
Mac computers use a "keychain" to store login information for faster access to things. When you change a password the keychain entry must be updated with the new password.
STEP 1: Go to System Preferences, open Printers and Scanners, and select Open Print Queue
STEP 2: Clear any held jobs by clicking the X beside the print job
STEP 4: Choose GO >> Connect to Server
STEP 6: When prompted enter Centre username and password and choose "remember this password in my keychain"