diff --git a/Xamarin.MacDev/MacOSXSdk.cs b/Xamarin.MacDev/MacOSXSdk.cs
index d4bc7d5..39e7a95 100644
--- a/Xamarin.MacDev/MacOSXSdk.cs
+++ b/Xamarin.MacDev/MacOSXSdk.cs
@@ -270,6 +270,9 @@ public AppleDTSettings GetAppleDTSettings ()
 		
 		static string GrabRootString (string file, string key)
 		{
+			if (!File.Exists (file))
+				return null;
+
 			var dict = PDictionary.FromFile (file);
 			PString value;