Heads-up: purges /var/spool/cups.
/var/spool/cups
$ cancel -a -x
/usr/local/sbin
sudo mkdir -p /usr/local/sbinsudo chown ${USER}:admin /usr/local/sbin
cups.sh
cat << "EOF" > /usr/local/sbin/cups.sh#! /bin/sh set -e if grep -qe '^PreserveJobHistory Off$' /etc/cups/cupsd.conf; then exit 0fi echo "PreserveJobHistory Off" | sudo tee -a /etc/cups/cupsd.conf sudo launchctl unload /System/Library/LaunchDaemons/org.cups.cupsd.plist sudo launchctl load /System/Library/LaunchDaemons/org.cups.cupsd.plistEOF
chmod +x /usr/local/sbin/cups.sh
local.cups.plist
cat << "EOF" | sudo tee /Library/LaunchDaemons/local.cups.plist<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"> <dict> <key>Label</key> <string>local.cups</string> <key>ProgramArguments</key> <array> <string>/usr/local/sbin/cups.sh</string> </array> <key>RunAtLoad</key> <true/> </dict></plist>EOF
π
PreserveJobHistory Off
cupsd.conf
sudo sed -i "" "/PreserveJobHistory Off/d" /etc/cups/cupsd.conf
sudo rm /usr/local/sbin/cups.sh
sudo rm /Library/LaunchDaemons/local.cups.plist
sudo launchctl unload /System/Library/LaunchDaemons/org.cups.cupsd.plist sudo launchctl load /System/Library/LaunchDaemons/org.cups.cupsd.plist