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However, the system keeps a factory-default version of this file called "" in the same folder as the working configuration file. The working configuration file or the CUPS service is called "nf" and is stored in the /private/etc/cups/ folder.
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It then removes the ".new" from the name of the empty property list to make it the current working version. This process starts with the system creating an empty standard XML property list file called "," and then renames the current printer list with the extension ".bak" to preserve it as a backup. First it creates a new, empty version of the installed printers property list, called "ist" in the /Library/Printers/ folder.This service may appear to only remove your printers, but it in fact does a number of checks on the system and restores configuration files to factory defaults.Īs part of its PrintCore framework, Apple includes a small program called "printtool" (buried in the /System/Library/Frameworks/amework/Versions/A/Frameworks/amework/Versions/A/ directory) which runs as a background process when you instruct the system to reset the print system, this process is launched and performs the following routines: Right-click the printer list to invoke the printer-reset routine. If you are having difficulty configuring your printers or even just printing to them in OS X, one thing to try is to reset the print system, which will clear out your printers and allow you to set them up again from scratch. The Common Unix Printing System (CUPS) is a collection of utilities and background services (along with their configuration files) that OS X uses to manage printers attached to your Mac.