diff --git a/src/NetMQ/Core/Transports/Tcp/TcpConnector.cs b/src/NetMQ/Core/Transports/Tcp/TcpConnector.cs
index fb22572f..e536cb6d 100755
--- a/src/NetMQ/Core/Transports/Tcp/TcpConnector.cs
+++ b/src/NetMQ/Core/Transports/Tcp/TcpConnector.cs
@@ -236,11 +236,18 @@ public void OutCompleted(SocketError socketError, int bytesTransferred)
                 m_ioObject.RemoveSocket(m_s);
                 m_handleValid = false;
 
-                try {
+                try
+                {
                     m_s.NoDelay = true;
-                } catch (ArgumentException) {
+                }
+                catch (ArgumentException)
+                {
                     // OSX sometime fail while the socket is still connecting
                 }
+                catch (SocketException ex) when (ex.SocketErrorCode == SocketError.InvalidArgument)
+                {
+                    // macOS may report EINVAL here while the socket is still connecting.
+                }
 
                 // As long as the TCP keep-alive option is not -1 (indicating no change),
                 if (m_options.TcpKeepalive != -1)