title: macOS en5 network can't be turned off
body: <p>I have MacBook Pro 2017, and currently am using High Sierra. I have specific requirement by some software to disable all networks. But this en5 network can't be disabled. </p>
  
  <p>I have removed everything from Networks in network preferences. When I try to disable it through terminal <code>sudo ifconfig en5 down</code> I get <strong>ifconfig: down: permission denied</strong>.</p>
  
  <p>Few days ago I ran across some article saying I need to change some permits to my sudo user but I can't find that article now :(. 
  Here are some more info on en5 from terminal</p>
  
  <pre><code>defaults read /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist | grep en5
          "BSD Name" = en5;
          IOPathMatch = "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/XHC1@14/XHC1@14000000/HS03@14100000/iBridge@14100000/NCM Data@5/AppleUSBNCMData/en5";
  
  
  en5: flags=8863&lt;UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST&gt; mtu 1500
  ether ac:de:48:00:11:22 
  inet6 fe80::aede:48ff:fe00:1122%en5 prefixlen 64 scopeid 0x7 
  nd6 options=201&lt;PERFORMNUD,DAD&gt;
  media: autoselect
  status: active
  </code></pre>
  
  <p>Any Idea how to disable this en5 network?</p>