launchctl unload /System/Library/LaunchDaemons/org.cups.cupsd.plist
tar cvzf cups-backup.tar.gz /etc/cups
launchctl load /System/Library/LaunchDaemons/org.cups.cupsd.plist

• http://www.splinter.com.au/using-launchd-to-run-a-script-every-5-mins-on/

1. Hozzuk létre a nyomtató helyreállító /opt/tia/tia-enable-printers scriptet:

   tia-enable-printers

   #!/bin/bash -e
   PATH=/opt/local/bin:/opt/local/sbin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin
    
   lpstat -p |
       grep -i disabled |
       sed -E 's>^printer ([^ ]+) .*>\1>' |
       while read printer
       do
           cupsaccept "${printer}"
           cupsenable "${printer}"
       done
    
   exit 0

2. Hozzuk létre az /opt/tia/tia.enable-printers.plist ütemezett feladatot:

   tia.enable-printers.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>tia.enable-printers</string>
       <key>ProgramArguments</key>
       <array>
           <string>/opt/tia/tia-enable-printers</string>
       </array>
       <key>StartInterval</key>
       <integer>15</integer>
   </dict>
   </plist>

3. Mozgassuk a helyére:

   mv '/opt/tia/tia.enable-printers.plist' '/Library/LaunchDaemons/'

4. Töltsük be az ütemezett feladatot:

   launchctl load -w '/Library/LaunchDaemons/tia.enable-printers.plist'

• https://bugs.launchpad.net/ubuntu/+source/cupsys/+bug/255161/comments/28