OS: Handle the MacOS case for QMenuBar in Window

src/UI/Window.cc

@@ -82,5 +82,9 @@ Window::layout() const noexcept
 QMenuBar *
 Window::menuBar() const noexcept
 {
+#ifndef VIVY_MACOS
     return titleBar->menuBar();
+#else
+    return QMainWindow::menuBar();
+#endif
 }

src/VivyApplication.hh

@@ -12,6 +12,11 @@
 #include <QPixmap>
 #include <QFont>
 
+// Detect MacOS
+#if defined(Q_OS_DARWIN) || defined(Q_OS_MACOS)
+#define VIVY_MACOS
+#endif
+
 #include "Lib/Document/VivyDocumentStore.hh"
 
 namespace Vivy