For /var/log/system.log
full of errors like these ones:
kernel[0]: Sandbox: com.apple.Addres(XXXXX) deny(1) network-outbound /private/var/run/mDNSResponder
com.apple.AddressBook.InternetAccountsBridge[XXXXX]: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
com.apple.AddressBook.InternetAccountsBridge[XXXXX]: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mDNSResponder Socket:4 Err:-1 Errno:1 Operation not permitted
How to fix it?