Error pushing from Xcode to GitHub in proxy environment

 curl error: Failed to connect to github.com port 443: Operation timed out(-1)

• I have set the proxy for the mac network configuration.
• I have configured Remotees for Source Control Navigator in Xcode.
• You can do pull, clone in Xcode

• .gitconfig is configured as follows:

  $cat to /.gitconfig
  [https]
  proxy=http://{proxy server}:{port}
  [http]
  proxy=http://{proxy server}:{port}
  [user]
  name = {user}
  

• In GitHub Desktop, Atom, pull, push works fine, so I think gitconfig works.

• .curlrc is configured as follows:

  $cat to /.curlrc
  proxy=http://{proxy server}:{port}
  

$cat to /.gitconfig
[https]
proxy=http://{proxy server}:{port}
[http]
proxy=http://{proxy server}:{port}
[user]
name = {user}

$cat to /.curlrc
proxy=http://{proxy server}:{port}