If it appears that all configured printers are having problems, what's a potential quick fix?
A
Using the Finder Info window you can force an application to open in 32-bit mode. This step is necessary for a 64-bit application to support older 32-bit plug-ins or application resources.
B
If a master password is reset because it was lost, Legacy FileVault accounts can't be reset by the new master password.
C
If all printers appear to be having problems, a quick fix is to reset the entire printing system by using secondary (or Control-) click in the printer list and then choosing "Reset printing system."
D
If a network device needs to send data to another network device on the same LAN, it addresses the outgoing packets based on the destination device's MAC address.