- add maccatalyst instructions

Author: PureWeen

.github/instructions/uitests.instructions.md

@@ -262,6 +262,21 @@ xcrun simctl list devices | grep "$UDID"
 dotnet test src/Controls/tests/TestCases.iOS.Tests/Controls.TestCases.iOS.Tests.csproj --filter "FullyQualifiedName~Issue12345"
 ```
 
+**MacCatalyst:**
+
+**Step 1: Deploy TestCases.HostApp to MacCatalyst**
+```bash
+# Use local dotnet if available, otherwise use global dotnet
+./bin/dotnet/dotnet build src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj -f net10.0-maccatalyst -t:Run
+# OR:
+dotnet build src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj -f net10.0-maccatalyst -t:Run
+```
+
+**Step 2: Run your specific test**
+```bash
+dotnet test src/Controls/tests/TestCases.Mac.Tests/Controls.TestCases.Mac.Tests.csproj --filter "FullyQualifiedName~Issue12345"
+```
+
 ### Troubleshooting
 
 **Android App Crashes on Launch:**

AGENTS.md

@@ -223,11 +223,23 @@ dotnet cake eng/devices/android.cake --target=uitest --test-filter="FullyQualifi
    xcrun simctl list devices | grep "$UDID"
    ```
 
-3. **Run specific tests:**
+3. **Deploy TestCases.HostApp to MacCatalyst:**
    ```bash
-   # Run specific test by name
+   # Build and run the MacCatalyst app
+   dotnet build src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj -f net10.0-maccatalyst -t:Run
+   ```
+
+4. **Run specific tests:**
+   ```bash
+   # Android tests
    dotnet test src/Controls/tests/TestCases.Android.Tests/Controls.TestCases.Android.Tests.csproj --filter "FullyQualifiedName~Issue11311"
 
+   # iOS tests
+   dotnet test src/Controls/tests/TestCases.iOS.Tests/Controls.TestCases.iOS.Tests.csproj --filter "FullyQualifiedName~Issue11311"
+
+   # MacCatalyst tests
+   dotnet test src/Controls/tests/TestCases.Mac.Tests/Controls.TestCases.Mac.Tests.csproj --filter "FullyQualifiedName~Issue11311"
+
    # Run all tests for a category
    dotnet test src/Controls/tests/TestCases.Android.Tests/Controls.TestCases.Android.Tests.csproj --filter "Category=CollectionView"
    ```

docs/UITesting-Guide.md

@@ -365,6 +365,21 @@ For rapid development and debugging, you can run specific tests directly:
    dotnet test src/Controls/tests/TestCases.iOS.Tests/Controls.TestCases.iOS.Tests.csproj --filter "FullyQualifiedName~Issue11311"
    ```
 
+**MacCatalyst:**
+
+1. Deploy TestCases.HostApp to MacCatalyst:
+   ```bash
+   # Use local dotnet if available, otherwise use global dotnet
+   ./bin/dotnet/dotnet build src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj -f net10.0-maccatalyst -t:Run
+   # OR:
+   dotnet build src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj -f net10.0-maccatalyst -t:Run
+   ```
+
+2. Run specific test:
+   ```bash
+   dotnet test src/Controls/tests/TestCases.Mac.Tests/Controls.TestCases.Mac.Tests.csproj --filter "FullyQualifiedName~Issue11311"
+   ```
+
 ### Full Test Suite: Using Cake Build System
 
 For comprehensive CI-like test runs: