Qt: Default MacOS fractional window scale to disabled

src/duckstation-qt/interfacesettingswidget.cpp

@@ -101,7 +101,7 @@ InterfaceSettingsWidget::InterfaceSettingsWidget(SettingsWindow* dialog, QWidget
 #endif
 #ifdef __APPLE__
   SettingWidgetBinder::BindWidgetToBoolSetting(sif, m_ui.useFractionalWindowScale, "Main", "UseFractionalWindowScale",
-                                               true);
+                                               false);
 #else
   QtUtils::SafeDeleteWidget(m_ui.useFractionalWindowScale);
 #endif

src/duckstation-qt/qthost.cpp

@@ -628,8 +628,10 @@ void CoreThread::setDefaultSettings(bool host, bool system, bool controller)
 
 void Host::SetDefaultSettings(SettingsInterface& si)
 {
-#ifdef _WIN32
+#if defined(_WIN32)
   si.SetBoolValue("Main", "DisableWindowRoundedCorners", false);
+#elif defined(__APPLE__)
+  si.SetBoolValue("Main", "UseFractionalWindowScale", false);
 #endif
 
   si.SetBoolValue("Main", "DisableWindowResize", false);

src/duckstation-qt/qtwindowinfo.cpp

@@ -164,7 +164,7 @@ void QtUtils::UpdateSurfaceSize(QWidget* widget, RenderAPI render_api, WindowInf
 
     // Only use "real" fractional window scale for Metal renderer.
     // Vulkan returns suboptimal constantly, triggering swap chain recreations.
-    if (render_api == RenderAPI::Metal && Core::GetBaseBoolSettingValue("Main", "UseFractionalWindowScale", true))
+    if (render_api == RenderAPI::Metal && Core::GetBaseBoolSettingValue("Main", "UseFractionalWindowScale", false))
     {
       if (const std::optional<double> real_device_pixel_ratio = CocoaTools::GetViewRealScalingFactor(wi->window_handle))
       {