I did this: int main(int argc, const char * argv[]) { // insert code here... std::cout << "Hello, World!\n"; system("ping 192.168.178.54"); return 0; it simple works. But when i request the ping in my program i get ping: cannot resolve 192.168.178.54\003: Unknown host strange!!!???

yes, i have now 2 identical Entries for my program, but still no access to the local network.

I tried the way you mentioned. In my case I was using Apple Development signing. That is, in Signing & Capabilities: I have “Automatically manage signing” checked. My team is selected in the Team popup. And the Signing Certificate popup is set to Development. as you recommended. If i select Product -> Run -> Connecting to server 192.168.178.113:5033 Cannot connect to server. errno 65. I understand, this must be a problem with XCODE and the access to local network.

I am building a tool. It works fine, but if i test the program with the XCode Debugger all request to the local network fails. It should be a problem within XCode. Therefore i can no longer test my program.

I have the same problem when i try to debug my c++ app within XCode. There ist no local network access possible. My app works fine, when it runs from the command line.