Apple MacOS has beautiful rounded corner scrollbar and add to the UI experience you have while working on a MacOS machine. You can easily have similar scrollbar style for your WPF application to boost up your application's UI experience. If you wish to apply this scrollbar style application wide then you should follow below steps. Step: Create a new resource dictionary (skip creating if you already have one) file and add the following code to it. <Style x:Key="ScrollBarTrackThumb" TargetType="{x:Type Thumb}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type Thumb}"> <Grid x:Name="Grid"> <Rectangle HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="Auto" Height="Auto" Fill="Transparent" /> <Border x:Name="CornerScrollBarRectangle" CornerRadius=" » Read more