diff --git a/src/plugins/platforms/cocoa/qcocoamenu.mm b/src/plugins/platforms/cocoa/qcocoamenu.mm
index 4b66d2b610..6d2ad6f719 100644
--- a/src/plugins/platforms/cocoa/qcocoamenu.mm
+++ b/src/plugins/platforms/cocoa/qcocoamenu.mm
@@ -42,6 +42,8 @@ QCocoaMenu::~QCocoaMenu()
             item->setMenuParent(nullptr);
     }
 
+    if (isOpen())
+        dismiss();
     [m_nativeMenu release];
 }
 
@@ -320,6 +322,8 @@ void QCocoaMenu::showPopup(const QWindow *parentWindow, const QRect &targetRect,
 {
     QMacAutoReleasePool pool;
 
+    QPointer<QCocoaMenu> guard = this;
+
     QPoint pos =  QPoint(targetRect.left(), targetRect.top() + targetRect.height());
     QCocoaWindow *cocoaWindow = parentWindow ? static_cast<QCocoaWindow *>(parentWindow->handle()) : nullptr;
     NSView *view = cocoaWindow ? cocoaWindow->view() : nil;
@@ -404,6 +408,11 @@ void QCocoaMenu::showPopup(const QWindow *parentWindow, const QRect &targetRect,
         }
     }
 
+    if (!guard) {
+        menuParentGuard.dismiss();
+        return;
+    }
+
     // 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 (cocoaWindow && !cocoaWindow->isForeignWindow())
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 4d6ce39007..97e6153b08 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -2469,12 +2469,13 @@ void QComboBoxPrivate::cleanupNativePopup()
     if (!m_platformMenu)
         return;
 
+    m_platformMenu->setVisible(false);
     int count = int(m_platformMenu->tag());
     for (int i = 0; i < count; ++i)
         m_platformMenu->menuItemAt(i)->deleteLater();
 
     delete m_platformMenu;
-    m_platformMenu = 0;
+    m_platformMenu = nullptr;
 }
 
 /*!
@@ -2531,15 +2532,18 @@ bool QComboBoxPrivate::showNativePopup()
     else if (q->testAttribute(Qt::WA_MacMiniSize))
         offset = QPoint(-2, 6);
 
+    [[maybe_unused]] QPointer<QComboBox> guard(q);
     const QRect targetRect = QRect(tlw->mapFromGlobal(q->mapToGlobal(offset)), QSize());
     m_platformMenu->showPopup(tlw, QHighDpi::toNativePixels(targetRect, tlw), currentItem);
 
 #ifdef Q_OS_MACOS
-    // The Cocoa popup will swallow any mouse release event.
-    // We need to fake one here to un-press the button.
-    QMouseEvent mouseReleased(QEvent::MouseButtonRelease, q->pos(), q->mapToGlobal(QPoint(0, 0)),
-                              Qt::LeftButton, Qt::MouseButtons(Qt::LeftButton), {});
-    QCoreApplication::sendEvent(q, &mouseReleased);
+    if (guard) {
+        // The Cocoa popup will swallow any mouse release event.
+        // We need to fake one here to un-press the button.
+        QMouseEvent mouseReleased(QEvent::MouseButtonRelease, q->pos(), q->mapToGlobal(QPoint(0, 0)),
+                                Qt::LeftButton, Qt::MouseButtons(Qt::LeftButton), {});
+        QCoreApplication::sendEvent(q, &mouseReleased);
+    }
 #endif
 
     return true;
@@ -3116,7 +3120,10 @@ void QComboBoxPrivate::showPopupFromMouseEvent(QMouseEvent *e)
             // viewContainer(), we avoid creating the QComboBoxPrivateContainer.
             viewContainer()->initialClickPosition = q->mapToGlobal(e->position().toPoint());
         }
+        QPointer<QComboBox> guard = q;
         q->showPopup();
+        if (!guard)
+            return;
         // The code below ensures that regular mousepress and pick item still works
         // If it was not called the viewContainer would ignore event since it didn't have
         // a mousePressEvent first.