diff --git a/src/ObjCRuntime/Protocol.cs b/src/ObjCRuntime/Protocol.cs
index 65832a16cb72..b766d4ca3a00 100644
--- a/src/ObjCRuntime/Protocol.cs
+++ b/src/ObjCRuntime/Protocol.cs
@@ -24,6 +24,19 @@ public Protocol (string name)
 				throw new ArgumentException (String.Format ("'{0}' is an unknown protocol", name));
 		}
 
+		public Protocol (Type type)
+		{
+			if (type.IsInterface) {
+				foreach (var pa in type.GetCustomAttributes<ProtocolAttribute> (false)) {
+					handle = objc_getProtocol (pa.Name);
+					if (handle != IntPtr.Zero)
+						return;
+				}
+			}
+			if (handle == IntPtr.Zero)
+				throw new ArgumentException (string.Format ("'{0}' is an unknown protocol", type.FullName));
+		}
+
 		public Protocol (IntPtr handle)
 		{
 			this.handle = handle;
diff --git a/src/modelio.cs b/src/modelio.cs
index e1bc9153cb37..a212b21417c0 100644
--- a/src/modelio.cs
+++ b/src/modelio.cs
@@ -90,6 +90,29 @@ interface MDLAsset : NSCopying
 		[Export ("canExportFileExtension:")]
 		bool CanExportFileExtension (string extension);
 
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Export ("components", ArgumentSemantic.Copy)]
+		IMDLComponent[] Components { get; }
+
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[EditorBrowsable (EditorBrowsableState.Advanced)]
+		[Export ("setComponent:forProtocol:")]
+		void SetComponent (IMDLComponent component, Protocol protocol);
+
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Wrap ("SetComponent (component, new Protocol (type))")]
+		void SetComponent (IMDLComponent component, Type type);
+
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[EditorBrowsable (EditorBrowsableState.Advanced)]
+		[Export ("componentConformingToProtocol:")]
+		[return: NullAllowed]
+		IMDLComponent GetComponent (Protocol protocol);
+
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Wrap ("GetComponent (new Protocol (type))")]
+		IMDLComponent GetComponent (Type type);
+
 		[iOS (10,0)]
 		[Mac (10,12)]
 		[TV (10,0)]
@@ -986,13 +1009,31 @@ interface MDLNormalMapTexture
 	[BaseType (typeof(NSObject))]
 	interface MDLObject : MDLNamed
 	{
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Export ("components", ArgumentSemantic.Copy)]
+		IMDLComponent[] Components { get; }
+
 		[Export ("setComponent:forProtocol:")]
 		void SetComponent (IMDLComponent component, Protocol protocol);
 
+		[Wrap ("SetComponent (component, new Protocol (type))")]
+		void SetComponent (IMDLComponent component, Type type);
+
+#if XAMCORE_4_0
+		[Internal]
+#endif
+		[Obsolete ("Use GetComponent (Type type)")]
 		[Export ("componentConformingToProtocol:")]
 		[return: NullAllowed]
 		IMDLComponent IsComponentConforming (Protocol protocol);
 
+		[EditorBrowsable (EditorBrowsableState.Advanced)]
+		[Wrap ("IsComponentConforming (protocol)")]
+		IMDLComponent GetComponent (Protocol protocol);
+
+		[Wrap ("GetComponent (new Protocol (type))")]
+		IMDLComponent GetComponent (Type type);
+
 		[NullAllowed, Export ("parent", ArgumentSemantic.Weak)]
 		MDLObject Parent { get; set; }
 
@@ -1068,6 +1109,14 @@ interface MDLObjectContainerComponent : MDLComponent, INSFastEnumeration
 		[Export ("removeObject:")]
 		void RemoveObject (MDLObject @object);
 
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Export ("objectAtIndexedSubscript:")]
+		MDLObject GetObject (nuint index);
+
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Export ("count")]
+		nuint Count { get; }
+
 		[Abstract]
 		[Export ("objects", ArgumentSemantic.Retain)]
  		MDLObject[] Objects { get; }
@@ -1537,6 +1586,11 @@ interface MDLTransform : MDLTransformComponent, NSCopying {
 		[MarshalDirective (NativePrefix = "xamarin_simd__", Library = "__Internal")]
 		void SetRotation (Vector3 rotation, double time);
 
+		[iOS (10,3), TV (10,2), Mac (10,12,4)]
+		[Export ("setMatrix:forTime:")]
+		[MarshalDirective (NativePrefix = "xamarin_simd__", Library = "__Internal")]
+		void SetMatrix (Matrix4 matrix, double time);
+
 		[Export ("shear", ArgumentSemantic.Assign)]
 		Vector3 Shear {
 			[MarshalDirective (NativePrefix = "xamarin_simd__", Library = "__Internal")]
diff --git a/tests/monotouch-test/ModelIO/MDLObject.cs b/tests/monotouch-test/ModelIO/MDLObject.cs
index e20d4728c47a..fa4274851bfa 100644
--- a/tests/monotouch-test/ModelIO/MDLObject.cs
+++ b/tests/monotouch-test/ModelIO/MDLObject.cs
@@ -1,5 +1,5 @@
 //
-// MDLLight Unit Tests
+// MDLObject Unit Tests
 //
 // Authors:
 //	Rolf Bjarne Kvinge <rolf@xamarin.com>
@@ -63,6 +63,16 @@ public void GetBoundingBox ()
 				var bb = obj.GetBoundingBox (0);
 			}
 		}
+
+		[Test]
+		public void ProtocolTest ()
+		{
+			using (var obj = new MDLObject ()) {
+				var p = new Protocol (typeof (IMDLComponent));
+				obj.SetComponent (new MDLTransform (), p);
+				Assert.NotNull (obj.IsComponentConforming (p));
+			}
+		}
 	}
 }