nrpe (icinga) client service doesn't load/run I just wrote following .plist file, which I put into /System/Library/LaunchDaemons, unluckily loading/running doesn't seem to work, and I have no idea what's wrong:

&lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/
PropertyList-1.0.dtd"&gt;
  &lt;plist version="1.0"&gt;
  &lt;dict&gt;
    &lt;key&gt;UserName&lt;/key&gt;
    &lt;string&gt;admin&lt;/string&gt;
    &lt;key&gt;GroupName&lt;/key&gt;
    &lt;string&gt;staff&lt;/string&gt;
    &lt;key&gt;ProgramArguments&lt;/key&gt;
    &lt;array&gt;
      &lt;string&gt;/usr/bin/nrpe&lt;/string&gt;
      &lt;string&gt;-c&lt;/string&gt;
      &lt;string&gt;/etc/nrpe.cfg&lt;/string&gt;
      &lt;string&gt;-i&lt;/string&gt;
    &lt;/array&gt;
    &lt;key&gt;Sockets&lt;/key&gt;
    &lt;dict&gt;
      &lt;key&gt;Listeners&lt;/key&gt;
      &lt;dict&gt;
        &lt;key&gt;SockServiceName&lt;/key&gt;
        &lt;string&gt;5666&lt;/string&gt;
        &lt;key&gt;SockType&lt;/key&gt;
        &lt;string&gt;stream&lt;/string&gt;
        &lt;key&gt;SockFamily&lt;/key&gt;
        &lt;string&gt;IPv4&lt;/string&gt;
      &lt;/dict&gt;
    &lt;/dict&gt;
    &lt;key&gt;inetdCompatibility&lt;/key&gt;
    &lt;dict&gt;
      &lt;key&gt;Wait&lt;/key&gt;
      &lt;false/&gt;
    &lt;/dict&gt;
    &lt;key&gt;Label&lt;/key&gt;
    &lt;string&gt;org.hasfailed.nrpe&lt;/string&gt;
  &lt;/dict&gt;
&lt;/plist&gt;


I used the installer referenced here: http://tbartelmess.github.io/NRPE-OSX/

Upon calling

launchctl load org.hasfailed.nrpe.plist
launchctl start org.hasfailed.nrpe


the following error shows up in my /var/log/system.log:

Sep 11 10:21:11 tc-mac com.apple.xpc.launchd[1] (Listeners): assertion failed: 14F27: launchd + 30557 [C0446878-E8D0-3461-A226-91FF1C2B2DA6]: 0x30
If you have already installed NRPE-OSX there is no need to create a second LaunchDaemon.

The installer creates - besides a user nagios and group nagios - a file named com.nagios.nrpe.plist in /Library/LaunchDaemons with almost the same content as yours.

In addition you probably didn't change ownership of the file to root:staff and UserName/GroupName (admin/staff) in the plist are presumably false.