Lexmark MS812dn / MS812dtn
Open the printers folder.
Select the printer you want to update, and then do the following:
Navigate to the Configuration tab, and then select Update Now ‑ Ask Printer.
Apply the changes.
From System Preferences in the Apple menu, navigate to your printer, and then select Options & Supplies.
Navigate to the list of hardware options, and then add any installed options.
Universal Print Driver release notes history
Lexmark Universal Print Driver release information