Update CONTRIBUTING.md

Author: animator

CONTRIBUTING.md

@@ -129,20 +129,27 @@ flutter test test/widgets/codegen_previewer_test.dart
 
 Instead of copy pasting from pub.dev, it is recommended that you use `flutter pub add package_name` to add a new package to `pubspec.yaml`. You can read more [here](https://docs.flutter.dev/packages-and-plugins/using-packages#adding-a-package-dependency-to-an-app-using-flutter-pub-add).
 
-## Troubleshooting Common Issues
+## Platform-specific Additional Instructions
 
-### Network Connection Issues on macOS
+### macOS
 
-If you encounter a network connection error similar to the following while running your Flutter app on macOS:
+Add below keys to `macos/Runner/DebugProfile.entitlements` and `macos/Runner/Release.entitlements`.
 
 ```
-ClientException with SocketException: Connection failed (OS Error: Operation not permitted, errno = 1)
+	<key>com.apple.security.network.server</key>
+	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
+	<key>com.apple.security.files.downloads.read-write</key>
+	<true/>
+	<key>com.apple.security.files.user-selected.read-write</key>
+	<true/>
 ```
-Add below key to `macos/Runner/DebugProfile.entitlements` and `macos/Runner/Release.entitlements`.
+
+If not added, you can encounter a network connection error similar to the following while running your Flutter app on macOS:
 
 ```
- <key>com.apple.security.network.client</key>
- <true/>
+ClientException with SocketException: Connection failed (OS Error: Operation not permitted, errno = 1)
 ```
 
 You can read more [here](https://docs.flutter.dev/platform-integration/macos/building#setting-up-entitlements)