diff --git a/src/AppKit/NSAccessibility.cs b/src/AppKit/NSAccessibility.cs
index 30d32b25132..5ca6531326b 100644
--- a/src/AppKit/NSAccessibility.cs
+++ b/src/AppKit/NSAccessibility.cs
@@ -69,13 +69,13 @@ public enum NSAccessibilityPriorityLevel : long
 		High = 90
 	}
 
-#if !COREBUILD
 	[Mac (10,10)] // protocol added in 10.10
 	public partial interface INSAccessibility {}
 
 	[Mac (10,9)] // but the field/notifications are in 10.9
 	public partial class NSAccessibility
 	{
+#if !COREBUILD
 		[Mac (10,10)]
 		[DllImport (Constants.AppKitLibrary)]
 		static extern CGRect NSAccessibilityFrameInView (NSView parentView, CGRect frame);
@@ -229,6 +229,6 @@ public static bool SetMayContainProtectedContent (bool flag)
 		{
 			return NSAccessibilitySetMayContainProtectedContent (flag);
 		}
-	}
 #endif
+	}
 }
diff --git a/src/appkit.cs b/src/appkit.cs
index 8a8f2d4b461..b47c9be7646 100644
--- a/src/appkit.cs
+++ b/src/appkit.cs
@@ -23917,18 +23917,22 @@ interface NSAccessibility
 		[NullAllowed, Export ("accessibilityVerticalUnitDescription")]
 		string AccessibilityVerticalUnitDescription { get; set; }
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityLayoutPointForScreenPoint:")]
 		CGPoint GetAccessibilityLayoutForScreen (CGPoint point);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityLayoutSizeForScreenSize:")]
 		CGSize GetAccessibilityLayoutForScreen (CGSize size);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityScreenPointForLayoutPoint:")]
 		CGPoint GetAccessibilityScreenForLayout (CGPoint point);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityScreenSizeForLayoutSize:")]
 		CGSize GetAccessibilityScreenForLayout (CGSize size);
@@ -24123,6 +24127,7 @@ interface NSAccessibility
 		[NullAllowed, Export ("accessibilityColumnHeaderUIElements", ArgumentSemantic.Copy)]
 		NSObject[] AccessibilityColumnHeaderUIElements { get; set; }
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityCellForColumn:row:")]
 		[return: NullAllowed]
@@ -24178,41 +24183,50 @@ interface NSAccessibility
 		[NullAllowed, Export ("accessibilitySelectedTextRanges", ArgumentSemantic.Copy)]
 		NSValue[] AccessibilitySelectedTextRanges { get; set; }
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityAttributedStringForRange:")]
 		[return: NullAllowed]
 		NSAttributedString GetAccessibilityAttributedString (NSRange range);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityRangeForLine:")]
 		NSRange GetAccessibilityRangeForLine (nint line);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityStringForRange:")]
 		[return: NullAllowed]
 		string GetAccessibilityString (NSRange range);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityRangeForPosition:")]
 		NSRange GetAccessibilityRange (CGPoint point);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityRangeForIndex:")]
 		NSRange GetAccessibilityRange (nint index);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityFrameForRange:")]
 		CGRect GetAccessibilityFrame (NSRange range);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityRTFForRange:")]
 		[return: NullAllowed]
 		NSData GetAccessibilityRtf (NSRange range);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityStyleRangeForIndex:")]
 		NSRange GetAccessibilityStyleRange (nint index);
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("accessibilityLineForIndex:")]
 		nint GetAccessibilityLine (nint index);
@@ -24277,50 +24291,62 @@ interface NSAccessibility
 		[Export ("accessibilityMinimized")]
 		bool AccessibilityMinimized { [Bind ("isAccessibilityMinimized")] get; set; }
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformCancel")]
 		bool AccessibilityPerformCancel ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformConfirm")]
 		bool AccessibilityPerformConfirm ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformDecrement")]
 		bool AccessibilityPerformDecrement ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformDelete")]
 		bool AccessibilityPerformDelete ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformIncrement")]
 		bool AccessibilityPerformIncrement ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformPick")]
 		bool AccessibilityPerformPick ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformPress")]
 		bool AccessibilityPerformPress ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformRaise")]
 		bool AccessibilityPerformRaise ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformShowAlternateUI")]
 		bool AccessibilityPerformShowAlternateUI ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformShowDefaultUI")]
 		bool AccessibilityPerformShowDefaultUI ();
 
+		[Mac (10, 10)]
 		[Abstract]
 		[Export ("accessibilityPerformShowMenu")]
 		bool AccessibilityPerformShowMenu ();
 
+		[Mac (10,10)]
 		[Abstract]
 		[Export ("isAccessibilitySelectorAllowed:")]
 		bool IsAccessibilitySelectorAllowed (Selector selector);
diff --git a/tests/introspection/ApiAvailabilityTest.cs b/tests/introspection/ApiAvailabilityTest.cs
index ce01dc854ad..7fca0025a9c 100644
--- a/tests/introspection/ApiAvailabilityTest.cs
+++ b/tests/introspection/ApiAvailabilityTest.cs
@@ -141,7 +141,16 @@ public void Introduced ()
 
 					// Duplicate checks, e.g. same attribute on member and type (extranous metadata)
 					if (ma.Version == ta.Version) {
-						AddErrorLine ($"[FAIL] {ma.Version} ({m}) == {ta.Version} ({t})");
+						switch (t.FullName) {
+						case "AppKit.INSAccessibility":
+							// special case for [I]NSAccessibility type (10.9) / protocol (10.10) mix up
+							// https://github.com/xamarin/xamarin-macios/issues/10009
+							// better some dupes than being inaccurate when protocol members are inlined
+							break;
+						default:
+							AddErrorLine ($"[FAIL] {ma.Version} ({m}) == {ta.Version} ({t})");
+							break;
+						}
 					}
 					// Consistency checks, e.g. member lower than type
 					// note: that's valid in some cases, like a new base type being introduced