diff --git a/CHANGELOG.md b/CHANGELOG.md
index d8877f0..1fc1f8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -100,6 +100,7 @@ Other changes
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 3.37.8         | 2018-03-25     | optimized `networkDefaultInterface()` detection, fixed network `operstate` MacOS |
 | 3.37.7         | 2018-03-13     | celebrating 4th birthday |
 | 3.37.6         | 2018-03-12     | updated docs: fixed `diskLayout`and `mamlayout` |
 | 3.37.5         | 2018-03-12     | added support for `ip` instead of `ifconfig` |
diff --git a/README.md b/README.md
index 0484b98..6973848 100644
--- a/README.md
+++ b/README.md
@@ -9,37 +9,6 @@ Simple system and OS information library for [node.js][nodejs-url]
   [![Caretaker][caretaker-image]][caretaker-url]
   [![MIT license][license-img]][license-url]
 
-### systeminformation is celebrating 4th birthday today!
-
-```
-              (        (
-             ( )      ( )          (
-      (       Y        Y          ( )
-     ( )     |"|      |"|          Y
-      Y      | |      | |         |"|
-     |"|     | |.-----| |---.___  | |
-     | |  .--| |,~~~~~| |~~~,,,,'-| |
-     | |-,,~~'-'___   '-'       ~~| |._
-    .| |~       // ___            '-',,'.
-   /,'-'     <_// // _  __             ~,\
-  / ;     ,-,     \\_> <<_' ____________;_)
-  | ;    {(_)} _,      ._>>`'-._          |
-  | ;     '-'\_\/>              '-._      |
-  |\ ~,,,      _\__            ,,,,,'-.   |
-  | '-._ ~~,,,            ,,,~~ __.-'~ |  |
-  |     '-.__ ~~~~~~~~~~~~ __.-'       |__|
-  |\         `'----------'`           _|
-  | '=._                         __.=' |
-  :     '=.__               __.='      |
-   \         `'==========='`          .'
-    '-._                         __.-'
-        '-.__               __.-'
-             `'-----------'`
-```
-
-Born 2014-03-13, started as a small project, now over 6000 lines of code - still no dependencies. 
-Time to say thank you to all contributers!
-
 ## Quick Start
 
 Lightweight collection of 35+ functions to retrieve detailed hardware, system and OS information (Linux, macOS, partial Windows and FreeBSD support) - no npm dependencies.
@@ -602,9 +571,9 @@ OSX Temperature: credits here are going to:
 
 Linux is a registered trademark of Linus Torvalds. Apple, macOS, OS X are registered trademarks of Apple Inc.,
 Windows is a registered trademark of Microsoft Corporation. Node.js is a trademark of Joyent Inc.,
-Intel is a trademark of Intel Corporation, AMD is a trademark of Advanced Micro Devices Inc., 
-Raspberry Pi is a trademark of the Raspberry Pi Foundation, Debian is a trademark of the Debian Project, 
-Ubuntu is a trademark of Canonical Ltd., FreeBSD is a registered trademark of The FreeBSD Foundation, 
+Intel is a trademark of Intel Corporation, AMD is a trademark of Advanced Micro Devices Inc.,
+Raspberry Pi is a trademark of the Raspberry Pi Foundation, Debian is a trademark of the Debian Project,
+Ubuntu is a trademark of Canonical Ltd., FreeBSD is a registered trademark of The FreeBSD Foundation,
 Docker is a trademark of Docker, Inc.
 
 All other trademarks are the property of their respective owners.
diff --git a/lib/network.js b/lib/network.js
index 5b6e59c..5f541ca 100644
--- a/lib/network.js
+++ b/lib/network.js
@@ -37,38 +37,34 @@ let isIpAvailable;
 
 function getDefaultNetworkInterface() {
 
-  if (!_default_iface) {
-    let ifacename = '';
-    let scopeid = 9999;
-    if (_linux || _darwin || _freebsd || _openbsd) {
-      let cmd = '';
-      if (_linux)  cmd =  'route 2>/dev/null | grep default | awk "{print $8}"';
-      if (_darwin) cmd = 'route get 0.0.0.0 2>/dev/null | grep interface: | awk "{print $2}"';
-      if (_freebsd || _openbsd) cmd = 'route get 0.0.0.0 | grep interface:';
-      let result = execSync(cmd);
-      ifacename = result.toString().split('\n')[0];
-      if (ifacename.indexOf(':') > -1) {
-        ifacename = ifacename.split(':')[1].trim();
-      }
-    }
+  let ifaces = os.networkInterfaces();
+  let ifacename = '';
+  let scopeid = 9999;
 
-    if (!ifacename) {         // fallback - "first" external interface (sorted by scopeid)
-
-      let ifaces = os.networkInterfaces();
-
-      for (let dev in ifaces) {
-        if (ifaces.hasOwnProperty(dev)) {
-          ifaces[dev].forEach(function (details) {
-            if (details && details.internal === false && details.scopeid && details.scopeid < scopeid) {
-              ifacename = dev;
-              scopeid = details.scopeid;
-            }
-          });
+  // fallback - "first" external interface (sorted by scopeid)
+  for (let dev in ifaces) {
+    if (ifaces.hasOwnProperty(dev)) {
+      ifaces[dev].forEach(function (details) {
+        if (details && details.internal === false && details.scopeid && details.scopeid < scopeid) {
+          ifacename = dev;
+          scopeid = details.scopeid;
         }
-      }
+      });
     }
-    if (ifacename) _default_iface = ifacename;
   }
+  if (_linux || _darwin || _freebsd || _openbsd) {
+    let cmd = '';
+    if (_linux)  cmd =  'route 2>/dev/null | grep default | awk "{print $8}"';
+    if (_darwin) cmd = 'route get 0.0.0.0 2>/dev/null | grep interface: | awk "{print $2}"';
+    if (_freebsd || _openbsd) cmd = 'route get 0.0.0.0 | grep interface:';
+    let result = execSync(cmd);
+    ifacename = result.toString().split('\n')[0];
+    if (ifacename.indexOf(':') > -1) {
+      ifacename = ifacename.split(':')[1].trim();
+    }
+  }
+
+  if (ifacename) _default_iface = ifacename;
   return _default_iface;
 }
 
@@ -84,7 +80,7 @@ function getMacAddresses() {
         isIpAvailable = true;
       } else {
         isIpAvailable = false;
-      }  
+      }
     }
     const cmd = 'export LC_ALL=C; /sbin/' + ((isIpAvailable) ? 'ip link show up' : 'ifconfig') + '; unset LC_ALL';
     let res = execSync(cmd);
@@ -277,8 +273,7 @@ function networkStats(iface, callback) {
   return new Promise((resolve) => {
     process.nextTick(() => {
 
-      _default_iface = _default_iface || getDefaultNetworkInterface();
-      iface = iface || _default_iface; // (_darwin ? 'en0' : 'eth0');
+      iface = iface || getDefaultNetworkInterface();
 
       let result = {
         iface: iface,
@@ -357,7 +352,7 @@ function networkStats(iface, callback) {
                   rx = parseInt(stats[6]);
                   tx = parseInt(stats[9]);
 
-                  result = calcNetworkSpeed(iface, rx, tx, operstate);
+                  result = calcNetworkSpeed(iface, rx, tx, result.operstate);
                 }
               }
               if (callback) { callback(result); }