diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index 2179a858409..7eb2a350d35 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -1983,8 +1983,21 @@ bool QCocoaWindow::shouldRefuseKeyWindowAndFirstResponder()
     if (window()->flags() & (Qt::WindowDoesNotAcceptFocus | Qt::WindowTransparentForInput))
         return true;
 
-    if (QWindowPrivate::get(window())->blockedByModalWindow)
-        return true;
+    // For application modal windows, as well as direct parent windows
+    // of window modal windows, AppKit takes care of blocking interaction.
+    // The Qt expectation however, is that all transient parents of a
+    // window modal window is blocked, as reflected by QGuiApplication.
+    // We reflect this by returning false from this function for transient
+    // parents blocked by a modal window, but limit it to the cases not
+    // covered by AppKit to avoid potential unwanted side effects.
+    QWindow *modalWindow = nullptr;
+    if (QGuiApplicationPrivate::instance()->isWindowBlocked(window(), &modalWindow)) {
+        if (modalWindow->modality() == Qt::WindowModal && modalWindow->transientParent() != window()) {
+            qCDebug(lcQpaWindow) << "Refusing key window for" << this << "due to being"
+                << "blocked by" << modalWindow;
+            return true;
+        }
+    }
 
     if (m_inSetVisible) {
         QVariant showWithoutActivating = window()->property("_q_showWithoutActivating");