Add VS4Mac/macOS pivot to MAUI-Blazor tutorial

aspnetcore/blazor/hybrid/tutorials/windows-forms.md

@@ -71,6 +71,8 @@ Add an `_Imports.razor` file to the root of the project with an [`@using`](xref:
 @using Microsoft.AspNetCore.Components.Web
 ```
 
+Save the `_Imports.razor` file.
+
 Add a `wwwroot` folder to the project.
 
 Add an `index.html` file to the `wwwroot` folder with the following markup.
@@ -184,6 +186,8 @@ Add the following `Counter` component to the root of the project, which is the d
 }
 ```
 
+Save the `Counter` component (`Counter.razor`).
+
 In **Solution Explorer**, double-click on the `Form1.cs` file to open the designer:
 
 :::image type="content" source="windows-forms/_static/solution-explorer-1.png" alt-text="The Form1.cs file in Solution Explorer.":::

aspnetcore/blazor/hybrid/tutorials/wpf.md

@@ -86,6 +86,8 @@ Add an `_Imports.razor` file to the root of the project with an [`@using`](xref:
 @using Microsoft.AspNetCore.Components.Web
 ```
 
+Save the `_Imports.razor` file.
+
 Add a `wwwroot` folder to the project.
 
 Add an `index.html` file to the `wwwroot` folder with the following markup.
@@ -198,6 +200,8 @@ Add the following `Counter` component to the root of the project, which is the d
 }
 ```
 
+Save the `Counter` component (`Counter.razor`).
+
 If the `MainWindow` designer isn't open, open it by double-clicking the `MainWindow.xaml` file in **Solution Explorer**. In the `MainWindow` designer, replace the XAML code with the following:
 
 ```xaml

aspnetcore/zone-pivot-groups.yml

@@ -40,3 +40,11 @@ groups:
       title: WPF
     - id: winforms
       title: Windows Forms
+- id: blazor-hybrid-tutorial-vs-operating-systems
+  title: Operating System
+  prompt: Choose a Visual Studio operating system
+  pivots:
+    - id: windows
+      title: Windows
+    - id: macos
+      title: macOS