diff --git a/src/Constants.mac.cs.in b/src/Constants.mac.cs.in
index 32fef06f7f..838b0553a8 100644
--- a/src/Constants.mac.cs.in
+++ b/src/Constants.mac.cs.in
@@ -129,5 +129,6 @@ namespace MonoMac {
 		// macOS 10.13
 		public const string CoreMLLibrary = "/System/Library/Frameworks/CoreML.framework/CoreML";
 		public const string VisionLibrary = "/System/Library/Frameworks/Vision.framework/Vision";
+		public const string PhotosUILibrary = "/System/Library/Frameworks/Photos.framework/PhotosUI";
 	}
 }
diff --git a/src/PhotosUI/PHEnums.cs b/src/PhotosUI/PHEnums.cs
index a9fbb023cd..d5fdf07ec5 100644
--- a/src/PhotosUI/PHEnums.cs
+++ b/src/PhotosUI/PHEnums.cs
@@ -2,7 +2,7 @@ using System;
 using XamCore.ObjCRuntime;
 
 namespace XamCore.PhotosUI {
-
+#if !MONOMAC
 	[TV (10,0)]
 	[iOS (9,1)]
 	[Native]
@@ -22,4 +22,5 @@ namespace XamCore.PhotosUI {
 		OverContent = 1 << 0,
 		LiveOff = 1 << 1,
 	}
+#endif
 }
diff --git a/src/frameworks.sources b/src/frameworks.sources
index e069496273..7ba6c90f1b 100644
--- a/src/frameworks.sources
+++ b/src/frameworks.sources
@@ -1605,6 +1605,7 @@ MAC_FRAMEWORKS =            \
 	OpenGL                  \
 	PdfKit                  \
 	Photos                  \
+	PhotosUI				\
 	PrintCore		\
 	QTKit                   \
 	QuartzComposer          \
diff --git a/src/photos.cs b/src/photos.cs
index f1aff7db34..1b2305daaf 100644
--- a/src/photos.cs
+++ b/src/photos.cs
@@ -39,6 +39,9 @@ namespace XamCore.Photos
 	[iOS (8,0)]
 	[TV (10,0)]
 	[Mac (10,13, onlyOn64 : true)]
+#if MONOMAC
+	[DisableDefaultCtor] // Crashes mac introspection test
+#endif
 	[BaseType (typeof (PHObject))]
 	interface PHAsset {
 
@@ -123,7 +126,7 @@ namespace XamCore.Photos
 		[Export ("sourceType", ArgumentSemantic.Assign)]
 		PHAssetSourceType SourceType { get; }
 
-		[TV (11,0), iOS (11,0)]
+		[TV (11,0), iOS (11,0), NoMac]
 		[Export ("playbackStyle", ArgumentSemantic.Assign)]
 		PHAssetPlaybackStyle PlaybackStyle { get; }
 
@@ -1242,14 +1245,6 @@ namespace XamCore.Photos
 		NSData ProjectExtensionData { get; }
 	}
 
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[Static]
-	interface PHProjectType {
-		[Field ("PHProjectTypeUndefined")]
-		NSString Undefined { get; }
-	}
-
 	[Mac (10,13, onlyOn64 : true)]
 	[NoiOS][NoTV]
 	[BaseType (typeof (NSObject))]
@@ -1268,225 +1263,10 @@ namespace XamCore.Photos
 		void SetKeyAsset ([NullAllowed] PHAsset keyAsset);
 	}
 
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (PHProjectElement))]
-	interface PHProjectTextElement : NSSecureCoding {
-
-		[Export ("text")]
-		string Text { get; }
-
-		[NullAllowed, Export ("attributedText")]
-		NSAttributedString AttributedText { get; }
-
-		[Export ("textElementType")]
-		PHProjectTextElementType TextElementType { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (PHProjectElement))]
-	interface PHProjectJournalEntryElement : NSSecureCoding {
-
-		[Export ("date")]
-		NSDate Date { get; }
-
-		[NullAllowed, Export ("assetElement")]
-		PHProjectAssetElement AssetElement { get; }
-
-		[NullAllowed, Export ("textElement")]
-		PHProjectTextElement TextElement { get; }
-	}
-
 	[Mac (10,13, onlyOn64 : true)]
 	[NoiOS][NoTV]
 	[BaseType (typeof (NSObject))]
 	[DisableDefaultCtor]
-	interface PHProjectTypeDescription : NSSecureCoding {
-
-		[Export ("projectType")]
-		NSString ProjectType { get; }
-
-		[Export ("localizedTitle")]
-		string LocalizedTitle { get; }
-
-		[NullAllowed, Export ("localizedDescription")]
-		string LocalizedDescription { get; }
-
-		[NullAllowed, Export ("image", ArgumentSemantic.Copy)]
-		NSImage Image { get; }
-
-		[Export ("subtypeDescriptions", ArgumentSemantic.Copy)]
-		PHProjectTypeDescription[] SubtypeDescriptions { get; }
-
-		[Export ("initWithProjectType:title:description:image:subtypeDescriptions:")]
-		[DesignatedInitializer]
-		IntPtr Constructor (NSString projectType, string localizedTitle, [NullAllowed] string localizedDescription, [NullAllowed] NSImage image, PHProjectTypeDescription[] subtypeDescriptions);
-
-		[Export ("initWithProjectType:title:description:image:")]
-		IntPtr Constructor (NSString projectType, string localizedTitle, [NullAllowed] string localizedDescription, [NullAllowed] NSImage image);
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSObject))]
-	[DisableDefaultCtor]
-	interface PHProjectRegionOfInterest : NSSecureCoding {
-
-		[Export ("rect")]
-		CGRect Rect { get; }
-
-		[Export ("weight")]
-		double Weight { get; }
-
-		[Export ("identifier")]
-		string Identifier { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSObject))]
-	[DisableDefaultCtor]
-	interface PHProjectElement : NSSecureCoding {
-
-		[Export ("weight")]
-		double Weight { get; }
-
-		[Export ("placement")]
-		CGRect Placement { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (PHProjectElement))]
-	interface PHProjectAssetElement : NSSecureCoding {
-
-		[Export ("cloudAssetIdentifier")]
-		PHCloudIdentifier CloudAssetIdentifier { get; }
-
-		[Export ("annotation")]
-		string Annotation { get; }
-
-		[Export ("cropRect")]
-		CGRect CropRect { get; }
-
-		[Export ("regionsOfInterest")]
-		PHProjectRegionOfInterest[] RegionsOfInterest { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSExtensionContext))]
-	interface PHProjectExtensionContext {
-
-		[Export ("photoLibrary")]
-		PHPhotoLibrary PhotoLibrary { get; }
-
-		[Export ("project")]
-		PHProject Project { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSObject))]
-	[DisableDefaultCtor]
-	interface PHProjectInfo : NSSecureCoding {
-
-		[Export ("creationSource")]
-		PHProjectCreationSource CreationSource { get; }
-
-		[Export ("projectType")]
-		NSString ProjectType { get; }
-
-		[Export ("sections")]
-		PHProjectSection[] Sections { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSObject))]
-	[DisableDefaultCtor]
-	interface PHProjectSection : NSSecureCoding {
-
-		[Export ("sectionContents")]
-		PHProjectSectionContent[] SectionContents { get; }
-
-		[Export ("sectionType")]
-		PHProjectSectionType SectionType { get; }
-
-		[Export ("title")]
-		string Title { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSObject))]
-	[DisableDefaultCtor]
-	interface PHProjectSectionContent : NSSecureCoding {
-
-		[Export ("elements")]
-		PHProjectElement[] Elements { get; }
-
-		[Export ("numberOfColumns")]
-		nint NumberOfColumns { get; }
-
-		[Export ("aspectRatio")]
-		double AspectRatio { get; }
-
-		[Export ("cloudAssetIdentifiers")]
-		PHCloudIdentifier[] CloudAssetIdentifiers { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[Protocol]
-	interface PHProjectExtensionController {
-
-		[Export ("supportedProjectTypes", ArgumentSemantic.Copy)]
-		PHProjectTypeDescription[] SupportedProjectTypes { get; }
-
-		[Abstract]
-		[Export ("beginProjectWithExtensionContext:projectInfo:completion:")]
-		void BeginProject (PHProjectExtensionContext extensionContext, PHProjectInfo projectInfo, Action<NSError> completion);
-
-		[Abstract]
-		[Export ("resumeProjectWithExtensionContext:completion:")]
-		void ResumeProject (PHProjectExtensionContext extensionContext, Action<NSError> completion);
-
-		[Abstract]
-		[Export ("finishProjectWithCompletionHandler:")]
-		void FinishProject (Action completion);
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[Protocol]
-	interface PHContentEditingController {
-
-		[Abstract]
-		[Export ("canHandleAdjustmentData:")]
-		bool CanHandleAdjustmentData (PHAdjustmentData adjustmentData);
-
-		[Abstract]
-		[Export ("startContentEditingWithInput:placeholderImage:")]
-		void StartContentEditing (PHContentEditingInput contentEditingInput, NSImage placeholderImage);
-
-		[Abstract]
-		[Export ("finishContentEditingWithCompletionHandler:")]
-		void FinishContentEditing (Action<PHContentEditingOutput> completionHandler);
-
-		[Abstract]
-		[Export ("cancelContentEditing")]
-		void CancelContentEditing ();
-
-		[Abstract]
-		[Export ("shouldShowCancelConfirmation")]
-		bool ShouldShowCancelConfirmation { get; }
-	}
-
-	[Mac (10,13, onlyOn64 : true)]
-	[NoiOS][NoTV]
-	[BaseType (typeof (NSObject))]
 	interface PHCloudIdentifier : NSSecureCoding {
 
 		[Static]
diff --git a/src/photosui.cs b/src/photosui.cs
index 4543c133ae..827cbe838c 100644
--- a/src/photosui.cs
+++ b/src/photosui.cs
@@ -1,16 +1,21 @@
 using XamCore.CoreGraphics;
 using XamCore.ObjCRuntime;
 using XamCore.Foundation;
+#if !MONOMAC
 using XamCore.UIKit;
+#else
+using XamCore.AppKit;
+using UIImage = XamCore.AppKit.NSImage;
+#endif
 using XamCore.Photos;
 using System;
 
-namespace XamCore.PhotosUI
-{
+namespace XamCore.PhotosUI {
 	[NoTV]
-	[iOS (8,0)]
+	[iOS (8, 0)]
+	[Mac (10, 13, onlyOn64: true)]
 	[Protocol]
-#if !XAMCORE_4_0 && !TVOS
+#if !XAMCORE_4_0 && !TVOS && !MONOMAC
 	// According to documentation you're supposed to implement this protocol in a UIViewController subclass,
 	// which means a model (which does not inherit from UIViewController) is not useful.
 	[Model]
@@ -39,6 +44,7 @@ namespace XamCore.PhotosUI
 		bool ShouldShowCancelConfirmation { get; }
 	}
 
+#if !MONOMAC
 	[TV (10,0)]
 	[iOS (9,1)]
 	[BaseType (typeof (UIView))]
@@ -77,7 +83,7 @@ namespace XamCore.PhotosUI
 	}
 
 	[TV (10,0)]
-	[iOS (9,1)]
+	[iOS (9,1)][NoMac]
 	[Protocol, Model]
 	[BaseType (typeof (NSObject))]
 	interface PHLivePhotoViewDelegate {
@@ -87,4 +93,206 @@ namespace XamCore.PhotosUI
 		[Export ("livePhotoView:didEndPlaybackWithStyle:")]
 		void DidEndPlayback (PHLivePhotoView livePhotoView, PHLivePhotoViewPlaybackStyle playbackStyle);
 	}
+#endif
+
+	[Mac (10,13, onlyOn64: true)][NoiOS][NoTV][NoWatch]
+	[Static]
+	interface PHProjectType {
+		[Field ("PHProjectTypeUndefined")]
+		NSString Undefined { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[DisableDefaultCtor]
+	[BaseType (typeof (NSExtensionContext))]
+	interface PHProjectExtensionContext : NSSecureCoding, NSCopying {
+
+		[Export ("photoLibrary")]
+		PHPhotoLibrary PhotoLibrary { get; }
+
+		[Export ("project")]
+		PHProject Project { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[DisableDefaultCtor]
+	[BaseType (typeof (PHProjectElement))]
+	interface PHProjectJournalEntryElement : NSSecureCoding {
+
+		[Export ("date")]
+		NSDate Date { get; }
+
+		[NullAllowed, Export ("assetElement")]
+		PHProjectAssetElement AssetElement { get; }
+
+		[NullAllowed, Export ("textElement")]
+		PHProjectTextElement TextElement { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[DisableDefaultCtor]
+	[BaseType (typeof (PHProjectElement))]
+	interface PHProjectTextElement : NSSecureCoding {
+
+		[Export ("text")]
+		string Text { get; }
+
+		[NullAllowed, Export ("attributedText")]
+		NSAttributedString AttributedText { get; }
+
+		[Export ("textElementType")]
+		PHProjectTextElementType TextElementType { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[Protocol]
+	interface PHProjectExtensionController {
+
+		[Export ("supportedProjectTypes", ArgumentSemantic.Copy)]
+		PHProjectTypeDescription [] GetSupportedProjectTypes ();
+
+		[Abstract]
+		[Export ("beginProjectWithExtensionContext:projectInfo:completion:")]
+		void BeginProject (PHProjectExtensionContext extensionContext, PHProjectInfo projectInfo, Action<NSError> completion);
+
+		[Abstract]
+		[Export ("resumeProjectWithExtensionContext:completion:")]
+		void ResumeProject (PHProjectExtensionContext extensionContext, Action<NSError> completion);
+
+		[Abstract]
+		[Export ("finishProjectWithCompletionHandler:")]
+		void FinishProject (Action completion);
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[BaseType (typeof (NSObject))]
+	[DisableDefaultCtor]
+	interface PHProjectTypeDescription : NSSecureCoding {
+
+		[Export ("projectType")]
+		NSString ProjectType { get; }
+
+		[Export ("localizedTitle")]
+		string LocalizedTitle { get; }
+
+		[NullAllowed, Export ("localizedDescription")]
+		string LocalizedDescription { get; }
+
+		[NullAllowed, Export ("image", ArgumentSemantic.Copy)]
+		UIImage Image { get; }
+
+		[Export ("subtypeDescriptions", ArgumentSemantic.Copy)]
+		PHProjectTypeDescription[] SubtypeDescriptions { get; }
+
+		[Export ("initWithProjectType:title:description:image:subtypeDescriptions:")]
+		[DesignatedInitializer]
+		IntPtr Constructor (NSString projectType, string localizedTitle, [NullAllowed] string localizedDescription, [NullAllowed] UIImage image, PHProjectTypeDescription[] subtypeDescriptions);
+
+		[Export ("initWithProjectType:title:description:image:")]
+		IntPtr Constructor (NSString projectType, string localizedTitle, [NullAllowed] string localizedDescription, [NullAllowed] UIImage image);
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[BaseType (typeof (NSObject))]
+	[DisableDefaultCtor]
+	interface PHProjectRegionOfInterest : NSSecureCoding {
+
+		[Export ("rect")]
+		CGRect Rect { get; }
+
+		[Export ("weight")]
+		double Weight { get; }
+
+		[Export ("identifier")]
+		string Identifier { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[BaseType (typeof (NSObject))]
+	[DisableDefaultCtor]
+	interface PHProjectElement : NSSecureCoding {
+
+		[Export ("weight")]
+		double Weight { get; }
+
+		[Export ("placement")]
+		CGRect Placement { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[DisableDefaultCtor]
+	[BaseType (typeof (PHProjectElement))]
+	interface PHProjectAssetElement : NSSecureCoding {
+
+		[Export ("cloudAssetIdentifier")]
+		PHCloudIdentifier CloudAssetIdentifier { get; }
+
+		[Export ("annotation")]
+		string Annotation { get; }
+
+		[Export ("cropRect")]
+		CGRect CropRect { get; }
+
+		[Export ("regionsOfInterest")]
+		PHProjectRegionOfInterest[] RegionsOfInterest { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[BaseType (typeof (NSObject))]
+	[DisableDefaultCtor]
+	interface PHProjectInfo : NSSecureCoding {
+
+		[Export ("creationSource")]
+		PHProjectCreationSource CreationSource { get; }
+
+		[Export ("projectType")]
+		NSString ProjectType { get; }
+
+		[Export ("sections")]
+		PHProjectSection[] Sections { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[BaseType (typeof (NSObject))]
+	[DisableDefaultCtor]
+	interface PHProjectSection : NSSecureCoding {
+
+		[Export ("sectionContents")]
+		PHProjectSectionContent[] SectionContents { get; }
+
+		[Export ("sectionType")]
+		PHProjectSectionType SectionType { get; }
+
+		[Export ("title")]
+		string Title { get; }
+	}
+
+	[Mac (10,13, onlyOn64 : true)]
+	[NoiOS][NoTV]
+	[BaseType (typeof (NSObject))]
+	[DisableDefaultCtor]
+	interface PHProjectSectionContent : NSSecureCoding {
+
+		[Export ("elements")]
+		PHProjectElement[] Elements { get; }
+
+		[Export ("numberOfColumns")]
+		nint NumberOfColumns { get; }
+
+		[Export ("aspectRatio")]
+		double AspectRatio { get; }
+
+		[Export ("cloudAssetIdentifiers")]
+		PHCloudIdentifier[] CloudAssetIdentifiers { get; }
+	}
 }
\ No newline at end of file