CFNetworkCopySystemProxySettings

This is working for me:

1. I created a tiny test project to print the result.

   import Foundation
   
   
   print(CFNetworkCopySystemProxySettings())

   .

2. I use the Network preferences panel to configure my network interface to use

   proxy.example.com:8080

   as the HTTP proxy.

3. I ran my test program and it printed the results I was expecting:

   $ ./ProxyDump
   Optional(Swift.Unmanaged<__ObjC.CFDictionary>(_value: {
       ExceptionsList =     (
           "*.local",
           "169.254/16"
       );
       FTPPassive = 1;
       HTTPEnable = 1;
       HTTPPort = 8080;
       HTTPProxy = "proxy.example.com";
       "__SCOPED__" =     {
           en0 =         {
               ExceptionsList =             (
                   "*.local",
                   "169.254/16"
               );
               FTPPassive = 1;
               HTTPEnable = 1;
               HTTPPort = 8080;
               HTTPProxy = "proxy.example.com";
           };
       };
   }))

   .

This was on 10.12.6 but I don’t have any reason to suspect that 10.12.5 would be any different.

How exactly as you testing this?

IMPORTANT Be aware that the system uses the proxy settings for the primary interface. If, for example, you set proxy settings on Wi-Fi and then plug-in Ethernet, the Wi-Fi settings won’t apply because Ethernet is primary.

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