Print Therapy 7.0.2
Print Therapy is the only utility in the world designed to diagnose and repair problems that can occur with the Mac OS X printing system.
These problems include, but are not limited to, the inability to open the Print & Fax System Preference pane, inabillity to add printers, disappearing print jobs, corrupted preference files, and inability to create PDF files. Print Therapy also includes some useful tools for deleting extra printer drivers, installing or deleting PPD files, deleting old spool files, backing up and restoring the printing system, and resetting the printing system.
Mac OS X 10.6 or later. See home page for earlier Mac OS X versions.