diff --git a/src/plugins/platforms/cocoa/qcocoaglcontext.mm b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
index a7cc19b3bf..9e688f4d1b 100644
--- a/src/plugins/platforms/cocoa/qcocoaglcontext.mm
+++ b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
@@ -255,7 +255,8 @@ void QCocoaGLContext::setActiveWindow(QWindow *window)
     QCocoaWindow *cocoaWindow = static_cast<QCocoaWindow *>(window->handle());
     cocoaWindow->setCurrentContext(this);
 
-    [(QNSView *) cocoaWindow->view() setQCocoaGLContext:this];
+    Q_ASSERT(!cocoaWindow->isForeignWindow());
+    [qnsview_cast(cocoaWindow->view()) setQCocoaGLContext:this];
 }
 
 void QCocoaGLContext::updateSurfaceFormat()
diff --git a/src/plugins/platforms/cocoa/qcocoamenu.mm b/src/plugins/platforms/cocoa/qcocoamenu.mm
index e177a24e73..8e47974d12 100644
--- a/src/plugins/platforms/cocoa/qcocoamenu.mm
+++ b/src/plugins/platforms/cocoa/qcocoamenu.mm
@@ -581,8 +581,8 @@ void QCocoaMenu::showPopup(const QWindow *parentWindow, const QRect &targetRect,
 
     // The calls above block, and also swallow any mouse release event,
     // so we need to clear any mouse button that triggered the menu popup.
-    if ([view isKindOfClass:[QNSView class]])
-        [(QNSView *)view resetMouseButtons];
+    if (!cocoaWindow->isForeignWindow())
+        [qnsview_cast(view) resetMouseButtons];
 }
 
 void QCocoaMenu::dismiss()