diff --git a/vcl/osx/salframeview.mm b/vcl/osx/salframeview.mm
index b5a2d682e34c..ceab3c872fc4 100644
--- a/vcl/osx/salframeview.mm
+++ b/vcl/osx/salframeview.mm
@@ -440,6 +440,25 @@ static bool isMouseScrollWheelEvent( NSEvent *pEvent )
     {
         mpFrame->UpdateFrameGeometry();
         mpFrame->CallCallback( SalEvent::Move, nullptr );
+
+#if HAVE_FEATURE_SKIA
+        // tdf#163734 Flush parent frame when Skia is enabled
+        // When a dockable window is dragged by its titlebar, a rectangle
+        // may be drawn in its parent window. However, the Skia flush
+        // timer doesn't run until after the mouse button has been
+        // released (probably due to lowering of the Skia flush timer's
+        // priority to fix tdf#163734). So run the parent frame's Skia
+        // flush timer immediately to display the rectangle.
+        if ( SkiaHelper::isVCLSkiaEnabled() &&
+             mpFrame->mbShown && mpFrame->mpParent &&
+             AquaSalFrame::isAlive( mpFrame->mpParent ) &&
+             mpFrame->mpParent->mbShown )
+        {
+            AquaSalGraphics* pGraphics = mpFrame->mpParent->mpGraphics;
+            if ( pGraphics )
+                pGraphics->Flush();
+        }
+#endif
     }
 }
 
diff --git a/vcl/skia/gdiimpl.cxx b/vcl/skia/gdiimpl.cxx
index 815c52b119f2..579a2d98d7fa 100644
--- a/vcl/skia/gdiimpl.cxx
+++ b/vcl/skia/gdiimpl.cxx
@@ -269,16 +269,18 @@ public:
     {
         mpGraphics->performFlush();
         Stop();
-        // tdf#163945 Lower priority of Skia flush timer
-        // Commit f4c2c7c79cfe4464ac596afda37b8904d06969db fixed tdf#157312
-        // by lowering the timer priority to TaskPriority::POST_PAINT. But
-        // it caused tdf#163734 so it was reverted to TaskPriority::HIGHEST
-        // in commit 5a38e4f9798c5ff247aa57581adf2671485627fd.
-        // While reverting to TaskPriority::HIGHEST did not cause tdf#157312
-        // to reoccur, it did cause tdf#163945 so set the timer priority to
-        // TaskPriority::HIGH_IDLE. This priority appears to be low enough to
-        // fix tdf#16394 without causing tdf#163734 to reoccur.
-        SetPriority(TaskPriority::HIGH_IDLE);
+#ifdef MACOSX
+        // tdf#157312 and tdf#163945 Lower Skia flush timer priority on macOS
+        // On macOS, flushing with Skia/Metal is noticeably slower than
+        // with Skia/Raster. So lower the flush timer priority to
+        // TaskPriority::POST_PAINT so that the flush timer runs less
+        // frequently but each pass copies a more up-to-date offscreen
+        // surface.
+        // TODO: fix tdf#163734 on macOS
+        SetPriority(TaskPriority::POST_PAINT);
+#else
+        SetPriority(TaskPriority::HIGHEST);
+#endif
     }
 };