Apple print error nothing happens when press Print button

User with Apple laptop, clicked print button, nothing happens, do following steps, then reboot.

This can usually be fixed by going into the Terminal utility and there enter the command to operate on the CUPS printer name:

sudo lpadmin -p <PrinterName> -o auth-info-required=username,password

This will update the printer stanza in /etc/cups/printers.conf, and then the printing works.

From  http://people.bu.edu/rbs/ThingsApple/Macintosh/Macintosh-printing.html