Missing driver for printer - adobe postscript
Accordingly with the link here you have to download and install this software: Mac OS X 10.1 (PPD File).

After the installation of the file: PPDInst.dmg, I suggest you to install the printer from the System Preferences &gt; Printers &amp; Scanners &gt; (add a new printer by pressing + button) and you should not have problem for the printer's driver.