diff --git a/src/coreml.cs b/src/coreml.cs
index 2ab2272f03ce..cc4c862bd1e2 100644
--- a/src/coreml.cs
+++ b/src/coreml.cs
@@ -29,7 +29,7 @@ public enum MLFeatureType : nint {
 		String = 3,
 		Image = 4,
 		MultiArray = 5,
-		Dictionary = 6
+		Dictionary = 6,
 	}
 
 	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
@@ -38,8 +38,7 @@ public enum MLFeatureType : nint {
 	public enum MLModelError : nint {
 		Generic = 0,
 		FeatureType = 1,
-		DescriptionMismatch = 2,
-		Io = 3
+		IO = 3,
 	}
 
 	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
@@ -47,7 +46,7 @@ public enum MLModelError : nint {
 	public enum MLMultiArrayDataType : nint {
 		Double = 65536 | 64,
 		Float32 = 65536 | 32,
-		Int32 = 131072 | 32
+		Int32 = 131072 | 32,
 	}
 
 	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
@@ -76,6 +75,22 @@ interface MLFeatureDescription : NSCopying {
 
 		[Export ("isAllowedValue:")]
 		bool IsAllowed (MLFeatureValue value);
+
+		// Category MLFeatureDescription (MLFeatureValueConstraints)
+
+		// HACK: radar://33643011 -> https://trello.com/c/ZN712GOi
+
+		// [FAIL] Selector not found for CoreML.MLFeatureDescription : setMultiArrayConstraint:
+		[NullAllowed, Export ("multiArrayConstraint", ArgumentSemantic.Assign)]
+		MLMultiArrayConstraint MultiArrayConstraint { get; /*set;*/ }
+
+		// [FAIL] Selector not found for CoreML.MLFeatureDescription : setImageConstraint:
+		[NullAllowed, Export ("imageConstraint", ArgumentSemantic.Assign)]
+		MLImageConstraint ImageConstraint { get; /*set;*/ }
+
+		// [FAIL] Selector not found for CoreML.MLFeatureDescription : setDictionaryConstraint:
+		[NullAllowed, Export ("dictionaryConstraint", ArgumentSemantic.Assign)]
+		MLDictionaryConstraint DictionaryConstraint { get; /*set;*/ }
 	}
 
 	interface IMLFeatureProvider { }
@@ -166,11 +181,22 @@ interface MLModel {
 		[Static]
 		[Export ("modelWithContentsOfURL:error:")]
 		[return: NullAllowed]
-		MLModel FromUrl (NSUrl url, [NullAllowed] out NSError error);
+		MLModel FromUrl (NSUrl url, out NSError error);
 
 		[Export ("predictionFromFeatures:error:")]
 		[return: NullAllowed]
 		IMLFeatureProvider GetPrediction (IMLFeatureProvider input, out NSError error);
+
+		[Export ("predictionFromFeatures:options:error:")]
+		[return: NullAllowed]
+		IMLFeatureProvider GetPrediction (IMLFeatureProvider input, MLPredictionOptions options, out NSError error);
+
+		// Category MLModel (MLModelCompilation)
+
+		[Static]
+		[Export ("compileModelAtURL:error:")]
+		[return: NullAllowed]
+		NSUrl CompileModel (NSUrl modelUrl, out NSError error);
 	}
 
 	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
@@ -266,5 +292,49 @@ interface MLMultiArray {
 		[Export ("setObject:forKeyedSubscript:")]
 		void SetObject (NSNumber obj, NSNumber [] key);
 	}
+
+	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
+	[DisableDefaultCtor]
+	[BaseType (typeof (NSObject))]
+	interface MLDictionaryConstraint {
+
+		[Export ("keyType")]
+		MLFeatureType KeyType { get; }
+	}
+
+	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
+	[DisableDefaultCtor]
+	[BaseType (typeof (NSObject))]
+	interface MLImageConstraint {
+
+		[Export ("pixelsHigh")]
+		nint PixelsHigh { get; }
+
+		[Export ("pixelsWide")]
+		nint PixelsWide { get; }
+
+		[Export ("pixelFormatType")]
+		uint PixelFormatType { get; }
+	}
+
+	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
+	[DisableDefaultCtor]
+	[BaseType (typeof (NSObject))]
+	interface MLMultiArrayConstraint {
+
+		[Export ("shape")]
+		NSNumber [] Shape { get; }
+
+		[Export ("dataType")]
+		MLMultiArrayDataType DataType { get; }
+	}
+
+	[Watch (4,0), TV (11,0), Mac (10,13, onlyOn64: true), iOS (11,0)]
+	[BaseType (typeof (NSObject))]
+	interface MLPredictionOptions {
+
+		[Export ("usesCPUOnly")]
+		bool UsesCpuOnly { get; set; }
+	}
 }
 #endif // XAMCORE_2_0
diff --git a/tests/introspection/ApiProtocolTest.cs b/tests/introspection/ApiProtocolTest.cs
index 5f8ae17a00cb..c18789d3f0d9 100644
--- a/tests/introspection/ApiProtocolTest.cs
+++ b/tests/introspection/ApiProtocolTest.cs
@@ -81,6 +81,10 @@ protected virtual bool Skip (Type type, string protocolName)
 				case "GKCloudPlayer":
 				// iOS 10 : test throw because of generic usage
 				case "NSMeasurement`1":
+				// Xcode 9 - Conformance not in heades
+				case "MLDictionaryConstraint":
+				case "MLImageConstraint":
+				case "MLMultiArrayConstraint":
 					return true; // skip
 				}
 				break;
diff --git a/tests/xtro-sharpie/common.pending b/tests/xtro-sharpie/common.pending
index a429e4757e49..b4562f889f49 100644
--- a/tests/xtro-sharpie/common.pending
+++ b/tests/xtro-sharpie/common.pending
@@ -653,4 +653,12 @@
 # CoreML
 ## we do not have NSFastEnumeration and decided to not bind objectForKeyedSubscript using a local method instead
 !missing-protocol-conformance! MLDictionaryFeatureProvider should conform to NSFastEnumeration
-!missing-selector! MLDictionaryFeatureProvider::objectForKeyedSubscript: not bound
\ No newline at end of file
+!missing-selector! MLDictionaryFeatureProvider::objectForKeyedSubscript: not bound
+
+## radar://33643011 -> https://trello.com/c/ZN712GOi
+## [FAIL] Selector not found for CoreML.MLFeatureDescription : setMultiArrayConstraint:
+## [FAIL] Selector not found for CoreML.MLFeatureDescription : setImageConstraint:
+## [FAIL] Selector not found for CoreML.MLFeatureDescription : setDictionaryConstraint:
+!missing-selector! MLFeatureDescription::setDictionaryConstraint: not bound
+!missing-selector! MLFeatureDescription::setImageConstraint: not bound
+!missing-selector! MLFeatureDescription::setMultiArrayConstraint: not bound