diff --git a/README.md b/README.md
index 8f0cd36..2329097 100644
--- a/README.md
+++ b/README.md
@@ -328,6 +328,7 @@ I also created a nice little command line tool called [mmon][mmon-github-url] (m
 | si.uuid(cb) | {...} | X | X | X | X | X | object of several UUIDs |
 | | os | X | X | X | X |  | os specific UUID |
 | | hardware | X | X | X | X |  | hardware specific UUID |
+| | macs | X | X | X | X |  | MAC addresses |
 | si.versions(apps, cb) | {...} | X | X | X | X | X | version information (kernel, ssl, node, ...)<br />apps param is optional for detecting<br />only specific apps/libs<br />(string, comma separated) |
 | si.shell(cb) | : string | X | X | X |  |  | standard shell |
 | si.users(cb) | [{...}] | X | X | X | X | X | array of users online |
diff --git a/docs/os.html b/docs/os.html
index baf9c70..ba996cd 100644
--- a/docs/os.html
+++ b/docs/os.html
@@ -240,36 +240,6 @@ si.osInfo().then(data => console.log(data));</code></pre class="example">
   uefi: true
 }</pre>
                   </tr>
-                  <tr>
-                    <td>si.uuid(cb)</td>
-                    <td>{...}</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>object of several UUIDs</td>
-                  </tr>
-                  <tr>
-                    <td></td>
-                    <td>os</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td></td>
-                    <td>os specific UUID</td>
-                  </tr>
-                  <tr>
-                    <td></td>
-                    <td>hardware</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td>X</td>
-                    <td></td>
-                    <td>hardware specific UUID</td>
-                  </tr>
                   <tr>
                     <td>si.shell(cb)</td>
                     <td>: string</td>
@@ -768,4 +738,4 @@ si.users().then(data => console.log(data));</code></pre class="example">
   </script>
 </body>
 
-</html>
+</html>
\ No newline at end of file
diff --git a/docs/system.html b/docs/system.html
index 6e3dbc3..7938d0c 100644
--- a/docs/system.html
+++ b/docs/system.html
@@ -182,6 +182,64 @@ si.system().then(data => console.log(data));</code></pre class="example">
   sku: 'Mac-99878xxxx...',
   virtual: false,
 }
+</pre>
+                  </tr>
+                  <tr>
+                    <td>si.uuid(cb)</td>
+                    <td>{...}</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>object of several UUIDs</td>
+                  </tr>
+                  <tr>
+                    <td></td>
+                    <td>os</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td></td>
+                    <td>os specific UUID</td>
+                  </tr>
+                  <tr>
+                    <td></td>
+                    <td>hardware</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td></td>
+                    <td>hardware specific UUID</td>
+                  </tr>
+                  <tr>
+                    <td></td>
+                    <td>macs</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td>X</td>
+                    <td></td>
+                    <td>MAC addresses</td>
+                  </tr>
+                  <tr class="example">
+                    <td></td>
+                    <td colspan="7">
+                      <h5>Example</h5>
+                      <pre><code class="js">const si = require('systeminformation');
+si.uuid().then(data => console.log(data));</code></pre class="example">
+<pre class="example">
+{
+  os: 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx',
+  hardware: 'xxxxxxxxxxxxxx',
+  macs: [
+    '01:02:03:04:05:06',
+    '02:03:04:05:06:07',
+    'aa:bb:cc:dd:ee:ff'
+  ]
+}
 </pre>
                   </tr>
                   <tr>
@@ -473,4 +531,4 @@ si.chassis().then(data => console.log(data));</code></pre class="example">
   </script>
 </body>
 
-</html>
+</html>
\ No newline at end of file
diff --git a/lib/osinfo.js b/lib/osinfo.js
index 50b7f29..a35ec8a 100644
--- a/lib/osinfo.js
+++ b/lib/osinfo.js
@@ -960,13 +960,37 @@ function shell(callback) {
 
 exports.shell = shell;
 
+function getUniqueMacAdresses() {
+  const ifaces = os.networkInterfaces();
+  let macs = [];
+  for (let dev in ifaces) {
+    if ({}.hasOwnProperty.call(ifaces, dev)) {
+      ifaces[dev].forEach(function (details) {
+        if (details && details.mac && details.mac !== '00:00:00:00:00:00') {
+          const mac = details.mac.toLowerCase();
+          if (macs.indexOf(mac) === -1) {
+            macs.push(mac);
+          }
+        }
+      });
+    }
+  }
+  macs = macs.sort(function (a, b) {
+    if (a < b) { return -1; }
+    if (a > b) { return 1; }
+    return 0;
+  });
+  return macs;
+}
+
 function uuid(callback) {
   return new Promise((resolve) => {
     process.nextTick(() => {
 
       let result = {
         os: '',
-        hardware: ''
+        hardware: '',
+        macs: getUniqueMacAdresses()
       };
       let parts;