INSWindowHolder uses NSView and NSWindow types.

native/Avalonia.Native/src/OSX/INSWindowHolder.h

@@ -10,8 +10,8 @@
 
 struct INSWindowHolder
 {
-    virtual AvnWindow* _Nonnull GetNSWindow () = 0;
-    virtual AvnView* _Nonnull GetNSView () = 0;
+    virtual NSWindow* _Nonnull GetNSWindow () = 0;
+    virtual NSView* _Nonnull GetNSView () = 0;
 };
 
 #endif //AVALONIA_NATIVE_OSX_INSWINDOWHOLDER_H

native/Avalonia.Native/src/OSX/WindowBaseImpl.h

@@ -51,9 +51,9 @@ BEGIN_INTERFACE_MAP()
 
     virtual HRESULT ObtainNSViewHandleRetained(void **ret) override;
 
-    virtual AvnWindow *GetNSWindow() override;
+    virtual NSWindow *GetNSWindow() override;
 
-    virtual AvnView *GetNSView() override;
+    virtual NSView *GetNSView() override;
 
     virtual HRESULT Show(bool activate, bool isDialog) override;
 

native/Avalonia.Native/src/OSX/WindowBaseImpl.mm

@@ -60,11 +60,11 @@ HRESULT WindowBaseImpl::ObtainNSViewHandleRetained(void **ret) {
     return S_OK;
 }
 
-AvnWindow *WindowBaseImpl::GetNSWindow() {
+NSWindow *WindowBaseImpl::GetNSWindow() {
     return Window;
 }
 
-AvnView *WindowBaseImpl::GetNSView() {
+NSView *WindowBaseImpl::GetNSView() {
     return View;
 }