diff --git a/src/parser-os.js b/src/parser-os.js
new file mode 100644
index 0000000..3c27773
--- /dev/null
+++ b/src/parser-os.js
@@ -0,0 +1,24 @@
+import { getFirstMatch } from './utils';
+
+export default [
+  {
+    test: [/windows phone/i],
+    detect(ua) {
+      const version = getFirstMatch(/windows phone (?:os)?\s?(\d+(\.\d+)*)/i, ua);
+      return {
+        name: 'Windows Phone',
+        version
+      }
+    }
+  },
+  {
+    test: [/macintosh/i],
+    detect(ua) {
+      const version = getFirstMatch(/mac os x (\d+([_\s]\d+)*)/i, ua).replace(/[_\s]/g, '.');
+      return {
+        name: 'macOS',
+        version
+      }
+    }
+  }
+]
diff --git a/src/parser.js b/src/parser.js
index c52ddc3..41fc831 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -1,4 +1,5 @@
 import browsersList from './parser-browsers';
+import osList from './parser-os';
 
 class Parser {
   /**
@@ -95,9 +96,47 @@ class Parser {
   }
 
   getPlatform(){}
-  getOS(){}
-  parseOSName(){}
-  parseOSVersion(){}
+
+  getOS() {
+    if (this.parsedResult.os) {
+      return this.parsedResult.os;
+    }
+
+    return this._parseOS();
+  }
+
+  _parseOS() {
+    this.parsedResult.os = {};
+
+    const os = osList.find(_os => {
+      if (typeof _os.test === 'function') {
+        return _os.test(this);
+      }
+
+      if (_os.test instanceof Array) {
+        return _os.test.some((condition) => {
+          return this.test(condition);
+        });
+      }
+
+      throw new Error("Browser's test function is not valid");
+    });
+
+    if (os) {
+      this.parsedResult.os = os.detect(this.getUA());
+    }
+
+    return this.parsedResult.os;
+  }
+
+  getOSName(){
+    return this.getOS().name;
+  }
+
+  getOSVersion(){
+    return this.getOS().version;
+  }
+
   parseFullInfo(){}
 }
 
diff --git a/test/unit/parser.js b/test/unit/parser.js
index 8893983..dfde187 100644
--- a/test/unit/parser.js
+++ b/test/unit/parser.js
@@ -33,3 +33,18 @@ test('getBrowserName', t => {
 test('getBrowserVersion', t => {
   t.is(parser.getBrowserVersion(), '43.0.2442.1165');
 });
+
+test('_parseOS', t => {
+  const spy = sinon.spy(parser, '_parseOS');
+  parser.getOS();
+  t.truthy(spy.called);
+  parser._parseOS.restore();
+});
+
+test('getOSName', t => {
+  t.is(parser.getOSName(), 'macOS');
+});
+
+test('getOSVersion', t => {
+  t.is(parser.getOSVersion(), '10.12.4');
+});