startup_plist.xml

Place this in /System/Library/LaunchAgents/

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>com.apple.PubSub.Agent</string>
	<key>KeepAlive</key>
	<false/>
        <key>RunAtLoad</key>
        <false/>
        <key>StartInterval</key>
        <integer>1800</integer>     <!-- will be updated dynamically per-user -->
	<key>ProgramArguments</key>
	<array>
            <string>/System/Library/Frameworks/PubSub.framework/Versions/A/Resources/PubSubAgent.app/Contents/MacOS/PubSubAgent</string>
	</array>
	<key>ServiceIPC</key>
	<true/>
    
        <key>MachServices</key>
        <dict>
            <key>com.apple.pubsub.ipc</key>
            <dict>
                    <key>ResetAtClose</key>
                    <true/>
            </dict>
            <key>com.apple.pubsub.notification</key>
            <dict>
                    <key>ResetAtClose</key>
                    <true/>
            </dict>
        </dict>
    
	<key>Sockets</key>
	<dict>
		<key>Render</key>
		<dict>
			<key>SockFamily</key>
			<string>Unix</string>
			<key>SecureSocketWithKey</key>
			<string>Apple_PubSub_Socket_Render</string>
		</dict>
	</dict>
</dict>
</plist>