diff --git a/Xamarin.MacDev/MacOSXSdkVersion.cs b/Xamarin.MacDev/MacOSXSdkVersion.cs
index 4fabd1d..7c190d7 100644
--- a/Xamarin.MacDev/MacOSXSdkVersion.cs
+++ b/Xamarin.MacDev/MacOSXSdkVersion.cs
@@ -197,6 +197,7 @@ public MacOSXSdkVersion ResolveIfDefault (MacOSXSdk sdk)
 		public static readonly MacOSXSdkVersion V10_10 = new MacOSXSdkVersion (10, 10);
 		public static readonly MacOSXSdkVersion V10_11 = new MacOSXSdkVersion (10, 11);
 		public static readonly MacOSXSdkVersion V10_12 = new MacOSXSdkVersion (10, 12);
+		public static readonly MacOSXSdkVersion V10_13 = new MacOSXSdkVersion(10, 13);
 		
 		public static readonly MacOSXSdkVersion Cheetah = V10_0;
 		public static readonly MacOSXSdkVersion Puma = V10_1;
@@ -211,6 +212,7 @@ public MacOSXSdkVersion ResolveIfDefault (MacOSXSdk sdk)
 		public static readonly MacOSXSdkVersion Yosemite = V10_10;
 		public static readonly MacOSXSdkVersion ElCapitan = V10_11;
 		public static readonly MacOSXSdkVersion Sierra = V10_12;
+		public static readonly MacOSXSdkVersion HighSierra = V10_13;
 
 		public static string VersionName (MacOSXSdkVersion version)
 		{
@@ -255,6 +257,9 @@ public static string VersionName (MacOSXSdkVersion version)
 			case "10.12":
 				versionName = "Sierra";
 				break;
+			case "10.13":
+				versionName = "High Sierra";
+				break;
 			default:
 				versionName = string.Empty;
 				break;