diff --git a/mk/xamarin.mk b/mk/xamarin.mk
index 269429d0c7a4..3a381f41a006 100644
--- a/mk/xamarin.mk
+++ b/mk/xamarin.mk
@@ -1,5 +1,5 @@
 ifdef ENABLE_XAMARIN
-NEEDED_MACCORE_VERSION := 0b6c9c86bd31de83817b51290885e217dbdd6aa4
+NEEDED_MACCORE_VERSION := eb9c34d8752ccbc74eafe267232c4c77ba8f631f
 NEEDED_MACCORE_BRANCH := master
 
 MACCORE_DIRECTORY := maccore
diff --git a/tools/mtouch/mtouch.cs b/tools/mtouch/mtouch.cs
index 4881b766f724..49c8a538f0cc 100644
--- a/tools/mtouch/mtouch.cs
+++ b/tools/mtouch/mtouch.cs
@@ -834,6 +834,10 @@ public static void GatherFrameworks (Target target, HashSet<string> frameworks,
 						// framework specific processing
 						switch (framework.Name) {
 						case "CoreAudioKit":
+							// CoreAudioKit seems to be functional in the iOS 9 simulator.
+							if (app.IsSimulatorBuild && SDKVersion.Major < 9)
+								continue;
+							break;
 						case "Metal":
 						case "MetalKit":
 						case "MetalPerformanceShaders":