diff --git a/JetBrains.HabitatDetector/src/HabitatInfo.cs b/JetBrains.HabitatDetector/src/HabitatInfo.cs
index c0a5ca1..bbf158c 100644
--- a/JetBrains.HabitatDetector/src/HabitatInfo.cs
+++ b/JetBrains.HabitatDetector/src/HabitatInfo.cs
@@ -6,15 +6,21 @@
 namespace JetBrains.HabitatDetector
 {
   [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
+  [SuppressMessage("ReSharper", "InconsistentNaming")]
   public static partial class HabitatInfo
   {
-    public static JetClrImplementation ClrImplementation => Helper.ClrImplementation;
-    public static Version? MonoVersion => Helper.MonoVersion;
     public static JetPlatform Platform => Helper.Platform;
     public static JetArchitecture OSArchitecture => Helper.OSArchitecture;
     public static JetArchitecture ProcessArchitecture => Helper.ProcessArchitecture;
-    public static JetLinuxLibC? LinuxLibC => Helper.LinuxLibC;
     public static string OSName => Helper.OSName;
+
+    public static JetClrImplementation ClrImplementation => Helper.ClrImplementation;
+    public static Version? MonoVersion => Helper.MonoVersion;
+
+    public static JetLinuxLibC? LinuxLibC => Helper.LinuxLibC;
+
+    public static Version? MacOSVersion => Helper.MacOSVersion;
+
     public static uint? WindowsBuildNumber => Helper.WindowsBuildNumber;
     public static JetWindowsInstallationType? WindowsInstallationType => Helper.WindowsInstallationType;
     public static bool? WindowsIsUserAdministrator => Helper.WindowsIsUserAdministrator;
diff --git a/JetBrains.HabitatDetector/src/Impl/Helper.cs b/JetBrains.HabitatDetector/src/Impl/Helper.cs
index 506161f..a5eaa58 100644
--- a/JetBrains.HabitatDetector/src/Impl/Helper.cs
+++ b/JetBrains.HabitatDetector/src/Impl/Helper.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
 using System.Reflection;
 using JetBrains.HabitatDetector.Impl.Linux;
 using JetBrains.HabitatDetector.Impl.MacOsX;
@@ -8,15 +9,21 @@
 
 namespace JetBrains.HabitatDetector.Impl
 {
+  [SuppressMessage("ReSharper", "InconsistentNaming")]
   internal static class Helper
   {
-    internal static readonly JetClrImplementation ClrImplementation;
-    internal static readonly Version? MonoVersion;
     internal static readonly JetPlatform Platform;
     internal static readonly JetArchitecture OSArchitecture;
     internal static readonly JetArchitecture ProcessArchitecture;
-    internal static readonly JetLinuxLibC? LinuxLibC;
     internal static readonly string OSName;
+
+    internal static readonly JetClrImplementation ClrImplementation;
+    internal static readonly Version? MonoVersion;
+
+    internal static readonly JetLinuxLibC? LinuxLibC;
+
+    internal static readonly Version? MacOSVersion;
+
     internal static readonly uint? WindowsBuildNumber;
     internal static readonly JetWindowsInstallationType? WindowsInstallationType;
     internal static readonly bool? WindowsIsUserAdministrator;
@@ -72,7 +79,8 @@ static Helper()
         case JetPlatform.MacOsX:
           ProcessArchitecture = unameArchitecture;
           OSArchitecture = MacOsHelper.GetRunningUnderRosetta2() ? JetArchitecture.Arm64 : unameArchitecture; // Note(ww898): Process under Rosetta2 works only on ARM64 host!
-          OSName = MacOsHelper.GetOSName(unameArchitecture);
+          MacOSVersion = NormalizeVersion(MacOsHelper.GetOSVersion(unameArchitecture));
+          OSName = MacOsHelper.GetOSName(MacOSVersion);
           break;
         default: throw new PlatformNotSupportedException($"Unsupported platform {Platform}");
         }
@@ -89,17 +97,22 @@ static Helper()
           var n = displayNameStr.IndexOf(' ');
           var versionStr = n >= 0 ? displayNameStr.Substring(0, n) : displayNameStr;
 
+          Version? monoVersion;
 #if NET20 || NET30 || NET35
           try
           {
-            MonoVersion = new Version(versionStr);
+            monoVersion = new Version(versionStr);
           }
           catch
           {
+            monoVersion = null;
           }
 #else
-          Version.TryParse(versionStr, out MonoVersion);
+          Version.TryParse(versionStr, out monoVersion);
 #endif
+
+          if (monoVersion != null)
+            MonoVersion = NormalizeVersion(monoVersion);
         }
 #endif
 
@@ -109,6 +122,12 @@ static Helper()
         ClrImplementation = isNetCore ? JetClrImplementation.NetCore : JetClrImplementation.NetFramework;
     }
 
+    internal static Version NormalizeVersion(Version version) => version.Build > 0
+      ? version.Revision == -1
+        ? version
+        : new(version.Major, version.Minor, version.Build)
+      : new(version.Major, version.Minor);
+
     internal static unsafe JetArchitecture GetProcessArchitecture(int processId) => Platform switch
       {
         JetPlatform.FreeBSD or JetPlatform.Linux => OSArchitecture,
diff --git a/JetBrains.HabitatDetector/src/Impl/MacOsX/MacOsHelper.cs b/JetBrains.HabitatDetector/src/Impl/MacOsX/MacOsHelper.cs
index 0cece4f..a4def89 100644
--- a/JetBrains.HabitatDetector/src/Impl/MacOsX/MacOsHelper.cs
+++ b/JetBrains.HabitatDetector/src/Impl/MacOsX/MacOsHelper.cs
@@ -45,7 +45,7 @@ internal static class MacOsHelper
       return new string(Encoding.UTF8.GetChars(buf));
     }
 
-    private static unsafe Version GetOSVersion(JetArchitecture processArchitecture)
+    internal static unsafe Version GetOSVersion(JetArchitecture processArchitecture)
     {
       var processInfo = LibObjC.objc_msgSend(LibObjC.objc_getClass("NSProcessInfo"), LibObjC.sel_getUid("processInfo"));
       var operationSystemVersionUid = LibObjC.sel_getUid("operatingSystemVersion");
@@ -73,14 +73,17 @@ private static unsafe Version GetOSVersion(JetArchitecture processArchitecture)
       }
 
       // Note(ww898): Compatibility with older software! See also SYSTEM_VERSION_COMPAT=1. Big Sur and newer OSes always returns 10.16!!!
-      return major == 10 && minor == 16
-        ? new Version(11, 0, patch)
-        : new Version(major, minor, patch);
+      if (major == 10 && minor == 16)
+      {
+        major = 11;
+        minor = 0;
+      }
+
+      return new Version(major, minor, patch);
     }
 
-    internal static string GetOSName(JetArchitecture processArchitecture)
+    internal static string GetOSName(Version version)
     {
-      var version = GetOSVersion(processArchitecture);
       var build = GetSysctlKernOsVersion();
 
       var builder = new StringBuilder(version.Major switch
@@ -114,7 +117,7 @@ internal static string GetOSName(JetArchitecture processArchitecture)
         });
 
       builder.Append(' ').Append(version.Major).Append('.').Append(version.Minor);
-      if (version.Build != 0)
+      if (version.Build > 0)
         builder.Append('.').Append(version.Build);
       if (build != null)
         builder.Append(' ').Append(build);
diff --git a/JetBrains.HabitatDetector/src/Impl/Unix/UnixHelper.cs b/JetBrains.HabitatDetector/src/Impl/Unix/UnixHelper.cs
index 1deb4fe..fe74c71 100644
--- a/JetBrains.HabitatDetector/src/Impl/Unix/UnixHelper.cs
+++ b/JetBrains.HabitatDetector/src/Impl/Unix/UnixHelper.cs
@@ -1,9 +1,11 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
 using System.Text;
 
 namespace JetBrains.HabitatDetector.Impl.Unix
 {
+  [SuppressMessage("ReSharper", "InconsistentNaming")]
   internal static class UnixHelper
   {
     internal record struct UnameInfo(JetPlatform Platform, string Sysname, string Release, JetArchitecture Architecture);
diff --git a/JetBrains.HabitatDetector/src/Impl/Windows/WindowsHelper.cs b/JetBrains.HabitatDetector/src/Impl/Windows/WindowsHelper.cs
index dba36b7..9273bf3 100644
--- a/JetBrains.HabitatDetector/src/Impl/Windows/WindowsHelper.cs
+++ b/JetBrains.HabitatDetector/src/Impl/Windows/WindowsHelper.cs
@@ -1,10 +1,12 @@
 using System;
 using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
 using System.Text;
 using System.Text.RegularExpressions;
 
 namespace JetBrains.HabitatDetector.Impl.Windows
 {
+  [SuppressMessage("ReSharper", "InconsistentNaming")]
   internal static class WindowsHelper
   {
     internal static unsafe JetArchitecture GetProcessArchitecture()
diff --git a/JetBrains.HabitatDetector/src/JetBrains.HabitatDetector.csproj b/JetBrains.HabitatDetector/src/JetBrains.HabitatDetector.csproj
index a2b3f5c..9313330 100644
--- a/JetBrains.HabitatDetector/src/JetBrains.HabitatDetector.csproj
+++ b/JetBrains.HabitatDetector/src/JetBrains.HabitatDetector.csproj
@@ -27,9 +27,9 @@ Supported frameworks:
     • Mono 5.10 and later</PackageReleaseNotes>
     <RepositoryUrl>https://github.com/JetBrains/habitat-detector</RepositoryUrl>
     <PackageIcon>icon.png</PackageIcon>
-    <PackageTags>jetbrains habitat detect windows linux macos freebsd netstandard netframework</PackageTags>
+    <PackageTags>jetbrains windows linux macos freebsd netstandard netframework</PackageTags>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
-    <Version>1.2.1</Version>
+    <Version>1.3.0</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="JetBrains.FormatRipper" Version="2.2.0" />
diff --git a/JetBrains.HabitatDetector/tests/HabitatInfoTest.cs b/JetBrains.HabitatDetector/tests/HabitatInfoTest.cs
index 85fcba0..8a2fe4d 100644
--- a/JetBrains.HabitatDetector/tests/HabitatInfoTest.cs
+++ b/JetBrains.HabitatDetector/tests/HabitatInfoTest.cs
@@ -180,11 +180,23 @@ public void ArchitecturePresentableTest(JetArchitecture architecture, string exp
     [Test]
     public void CurrentTest()
     {
+      Console.WriteLine("{0}: {1}", nameof(Environment) + "." + nameof(Environment.OSVersion), Environment.OSVersion);
+      Console.WriteLine("{0}: {1}", nameof(Environment) + "." + nameof(Environment.OSVersion) + "." + nameof(Environment.OSVersion.Platform), Environment.OSVersion.Platform);
+      Console.WriteLine("{0}: {1}", nameof(Environment) + "." + nameof(Environment.OSVersion) + "." + nameof(Environment.OSVersion.Version), Environment.OSVersion.Version);
+      Console.WriteLine("{0}: {1}", nameof(Environment) + "." + nameof(Environment.OSVersion) + "." + nameof(Environment.OSVersion.ServicePack), Environment.OSVersion.ServicePack);
       Console.WriteLine("{0}: {1}", nameof(HabitatInfo.OSName), HabitatInfo.OSName);
       Console.WriteLine("{0}: {1}", nameof(HabitatInfo.ClrImplementation), HabitatInfo.ClrImplementation);
 
       if (HabitatInfo.ClrImplementation == JetClrImplementation.Mono)
+      {
         Console.WriteLine("{0}: {1}", nameof(HabitatInfo.MonoVersion), HabitatInfo.MonoVersion?.ToString() ?? "<null>");
+
+        if (HabitatInfo.MonoVersion != null)
+        {
+          Assert.AreNotEqual(0, HabitatInfo.MonoVersion.Build);
+          Assert.AreEqual(-1, HabitatInfo.MonoVersion.Revision);
+        }
+      }
       else
         Assert.IsNull(HabitatInfo.MonoVersion);
 
@@ -197,6 +209,8 @@ public void CurrentTest()
 
       if (HabitatInfo.Platform == JetPlatform.Windows)
       {
+        Assert.AreEqual(PlatformID.Win32NT, Environment.OSVersion.Platform);
+
         Console.WriteLine("{0}: {1}", nameof(HabitatInfo.WindowsBuildNumber), HabitatInfo.WindowsBuildNumber?.ToString() ?? "<null>");
         Console.WriteLine("{0}: {1}", nameof(HabitatInfo.WindowsInstallationType), HabitatInfo.WindowsInstallationType?.ToString() ?? "<null>");
         Console.WriteLine("{0}: {1}", nameof(HabitatInfo.WindowsIsUserAdministrator), HabitatInfo.WindowsIsUserAdministrator?.ToString() ?? "<null>");
@@ -207,15 +221,36 @@ public void CurrentTest()
         Assert.IsNotNull(HabitatInfo.WindowsIsUserAdministrator);
         Assert.IsNotNull(HabitatInfo.WindowsIsElevated);
         Assert.IsNotNull(HabitatInfo.WindowsElevationType);
+
+        Assert.AreEqual(Environment.OSVersion.Version.Build, checked((int)HabitatInfo.WindowsBuildNumber!));
       }
       else
       {
+        Assert.AreNotEqual(PlatformID.Win32NT, Environment.OSVersion.Platform);
+
         Assert.IsNull(HabitatInfo.WindowsInstallationType);
         Assert.IsNull(HabitatInfo.WindowsIsUserAdministrator);
         Assert.IsNull(HabitatInfo.WindowsIsElevated);
         Assert.IsNull(HabitatInfo.WindowsElevationType);
       }
 
+      if (HabitatInfo.Platform == JetPlatform.MacOsX)
+      {
+        Console.WriteLine("{0}: {1}", nameof(HabitatInfo.MacOSVersion), HabitatInfo.MacOSVersion?.ToString() ?? "<null>");
+
+        if (HabitatInfo.MacOSVersion != null)
+        {
+          Assert.AreNotEqual(0, HabitatInfo.MacOSVersion.Build);
+          Assert.AreEqual(-1, HabitatInfo.MacOSVersion.Revision);
+        }
+        else
+          Assert.Fail();
+      }
+      else
+      {
+        Assert.IsNull(HabitatInfo.MacOSVersion);
+      }
+
       Console.WriteLine("{0}: {1}", nameof(HabitatInfo.ProcessRuntimeIdString), HabitatInfo.ProcessRuntimeIdString);
       Console.WriteLine("{0}: {1}", nameof(HabitatInfo.OSRuntimeIdString), HabitatInfo.OSRuntimeIdString);
 
diff --git a/JetBrains.HabitatDetector/tests/UnitHelperTest.cs b/JetBrains.HabitatDetector/tests/UnitHelperTest.cs
index 409498f..b5fe294 100644
--- a/JetBrains.HabitatDetector/tests/UnitHelperTest.cs
+++ b/JetBrains.HabitatDetector/tests/UnitHelperTest.cs
@@ -1,4 +1,6 @@
-using JetBrains.HabitatDetector.Impl.Unix;
+using System;
+using JetBrains.HabitatDetector.Impl;
+using JetBrains.HabitatDetector.Impl.Unix;
 using NUnit.Framework;
 
 namespace JetBrains.HabitatDetector.Tests
@@ -30,5 +32,15 @@ public void PlatformTest(string sysname, JetPlatform expectedPlatform, int expec
     [TestCase(JetPlatform.MacOsX, "x86_64", JetArchitecture.X64)]
     [Test]
     public void ConvertToArchitecture(JetPlatform platform, string machine, JetArchitecture expectedArchitecture) => Assert.AreEqual(expectedArchitecture, UnixHelper.ConvertToArchitecture(platform, machine));
+
+    [Test]
+    public void NormalizeTest()
+    {
+      Assert.AreEqual(new Version(11, 222), Helper.NormalizeVersion(new Version(11, 222)));
+      Assert.AreEqual(new Version(11, 222), Helper.NormalizeVersion(new Version(11, 222, 0)));
+      Assert.AreEqual(new Version(11, 222, 3333), Helper.NormalizeVersion(new Version(11, 222, 3333)));
+      Assert.AreEqual(new Version(11, 222, 3333), Helper.NormalizeVersion(new Version(11, 222, 3333, 0)));
+      Assert.AreEqual(new Version(11, 222, 3333), Helper.NormalizeVersion(new Version(11, 222, 3333, 44444)));
+    }
   }
 }
\ No newline at end of file