diff --git a/CMakeLists.txt b/CMakeLists.txt
index 426d4800..d5c9cc80 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -113,6 +113,9 @@ macro(set_compiler_flags targetName)
     target_compile_definitions(${targetName} PRIVATE DOCKS_DEVELOPER_MODE QT_FORCE_ASSERTS)
     if(NOT MSVC)
       target_compile_options(${targetName} PRIVATE -Wall -Wextra -Werror -Wno-error=deprecated-declarations)
+      if (APPLE)
+        target_compile_options(${targetName} PRIVATE -Wweak-vtables)
+      endif()
     endif()
   endif()
 endmacro()
diff --git a/examples/dockwidgets/MyFrameworkWidgetFactory.cpp b/examples/dockwidgets/MyFrameworkWidgetFactory.cpp
index ca5730dc..76e0b814 100644
--- a/examples/dockwidgets/MyFrameworkWidgetFactory.cpp
+++ b/examples/dockwidgets/MyFrameworkWidgetFactory.cpp
@@ -32,6 +32,8 @@ public:
         init();
     }
 
+    ~MyTitleBar() override;
+
     void init()
     {
         setFixedHeight(60);
@@ -56,6 +58,8 @@ public:
     }
 };
 
+MyTitleBar::~MyTitleBar() = default;
+
 // Inheriting from SeparatorWidget instead of Separator as it handles moving and mouse cursor changing
 class MySeparator : public Layouting::SeparatorWidget
 {
@@ -65,6 +69,8 @@ public:
     {
     }
 
+    ~MySeparator() override;
+
     void paintEvent(QPaintEvent *) override
     {
         QPainter p(this);
@@ -72,6 +78,8 @@ public:
     }
 };
 
+MySeparator::~MySeparator() = default;
+
 KDDockWidgets::TitleBar * CustomWidgetFactory::createTitleBar(KDDockWidgets::Frame *frame) const
 {
     return new MyTitleBar(frame);
diff --git a/src/FocusScope.cpp b/src/FocusScope.cpp
index 53fe9ef6..616c9979 100644
--- a/src/FocusScope.cpp
+++ b/src/FocusScope.cpp
@@ -40,6 +40,8 @@ public:
         m_inCtor = false;
     }
 
+    ~Private() override;
+
     void setIsFocused(bool);
     void onFocusObjectChanged(QObject *);
     bool isInFocusScope(WidgetType *) const;
@@ -51,6 +53,9 @@ public:
     QPointer<WidgetType> m_lastFocusedInScope;
 };
 
+FocusScope::Private::~Private()
+{
+}
 
 FocusScope::FocusScope(QWidgetAdapter *thisWidget)
     : d(new Private(this, thisWidget))
diff --git a/src/FocusScope.h b/src/FocusScope.h
index dbd0bd09..fb152b6c 100644
--- a/src/FocusScope.h
+++ b/src/FocusScope.h
@@ -30,7 +30,7 @@ class FocusScope
 public:
     ///@brief constructor
     explicit FocusScope(QWidgetAdapter *thisWidget);
-    ~FocusScope();
+    virtual ~FocusScope();
 
     ///@brief Returns true if this FocusScope is focused.
     ///This is similar to the QWidget::hasFocus(), except that it counts with the children being focused too.
diff --git a/src/QWidgetAdapter.h b/src/QWidgetAdapter.h
index bbf5ea4a..906f0400 100644
--- a/src/QWidgetAdapter.h
+++ b/src/QWidgetAdapter.h
@@ -79,6 +79,8 @@ public:
         , LayoutGuestWidgetBase(this)
     {
     }
+
+  ~LayoutGuestWidget() override;
 };
 }
 
diff --git a/src/private/multisplitter/tests/tst_multisplitter.cpp b/src/private/multisplitter/tests/tst_multisplitter.cpp
index 92607a70..f5f3daac 100644
--- a/src/private/multisplitter/tests/tst_multisplitter.cpp
+++ b/src/private/multisplitter/tests/tst_multisplitter.cpp
@@ -207,9 +207,7 @@ class MyHostWidget : public QWidget
         s_testObject->m_hostWidgets << this;
     }
 
-    ~MyHostWidget() {
-        s_testObject->m_hostWidgets.removeOne(this);
-    }
+    ~MyHostWidget() override;
 
     void paintEvent(QPaintEvent *) override
     {
@@ -218,6 +216,10 @@ class MyHostWidget : public QWidget
     }
 };
 
+MyHostWidget::~MyHostWidget() {
+    s_testObject->m_hostWidgets.removeOne(this);
+}
+
 static bool serializeDeserializeTest(const std::unique_ptr<ItemContainer> &root)
 {
     // Serializes and deserializes a layout
diff --git a/src/private/widgets/QWidgetAdapter_widgets.cpp b/src/private/widgets/QWidgetAdapter_widgets.cpp
index 1d25299e..a94d8cb9 100644
--- a/src/private/widgets/QWidgetAdapter_widgets.cpp
+++ b/src/private/widgets/QWidgetAdapter_widgets.cpp
@@ -106,3 +106,5 @@ QWidget *KDDockWidgets::Private::widgetForWindow(QWindow *window)
 
     return window->property("kddockwidgets_qwidget").value<QWidget*>();
 }
+
+LayoutGuestWidget::~LayoutGuestWidget() = default;
diff --git a/tests/Testing.cpp b/tests/Testing.cpp
index 3f6b00e8..a2d03c08 100644
--- a/tests/Testing.cpp
+++ b/tests/Testing.cpp
@@ -29,7 +29,8 @@ class EventFilter : public QObject
 {
 public:
     EventFilter(QEvent::Type type) : m_type(type) {}
-    bool eventFilter(QObject *, QEvent *e)
+    ~EventFilter() override;
+    bool eventFilter(QObject *, QEvent *e) override
     {
         if (e->type() == m_type)
             m_got = true;
@@ -41,6 +42,8 @@ public:
     bool m_got = false;
 };
 
+EventFilter::~EventFilter() = default;
+
 static bool isGammaray()
 {
     static bool is = qtHookData[3] != 0;
@@ -142,3 +145,5 @@ void Testing::setWarningObserver(WarningObserver *observer)
 {
     s_warningObserver = observer;
 }
+
+WarningObserver::~WarningObserver() = default;
diff --git a/tests/Testing.h b/tests/Testing.h
index c7c8120a..8e090e4d 100644
--- a/tests/Testing.h
+++ b/tests/Testing.h
@@ -39,6 +39,7 @@ namespace Testing {
     class WarningObserver
     {
     public:
+        virtual ~WarningObserver();
         virtual void onFatal() = 0;
     };
 
diff --git a/tests/tst_docks.cpp b/tests/tst_docks.cpp
index 9fbc0fb1..e101bb97 100644
--- a/tests/tst_docks.cpp
+++ b/tests/tst_docks.cpp
@@ -206,9 +206,13 @@ public:
     {
     }
 
+    ~EmbeddedWindow() override;
+
     MainWindow *const mainWindow;
 };
 
+EmbeddedWindow::~EmbeddedWindow() = default;
+
 struct ExpectedAvailableSize // struct for testing MultiSplitterLayout::availableLengthForDrop()
 {
     KDDockWidgets::Location location;