Fix macOS scaling size

Author: 2dust

v2rayN/v2rayN.Desktop/Base/WindowBase.cs

@@ -30,7 +30,7 @@ protected virtual void OnLoaded(object? sender, RoutedEventArgs e)
             Height = sizeItem.Height;
 
             var workingArea = (Screens.ScreenFromWindow(this) ?? Screens.Primary).WorkingArea;
-            var scaling = VisualRoot?.RenderScaling ?? 1.0;
+            var scaling = (Utils.IsOSX() ? null : VisualRoot?.RenderScaling) ?? 1.0;
 
             var x = workingArea.X + ((workingArea.Width - (Width * scaling)) / 2);
             var y = workingArea.Y + ((workingArea.Height - (Height * scaling)) / 2);