Mac Catalyst Documentation and Sample Code

1. Documentation on Mac Catalyst:

https://developer.apple.com/documentation/uikit/mac_catalyst

2. Human Inteface Guidelines for Mac Catalyst:

https://developer.apple.com/design/human-interface-guidelines/ios/overview/mac-catalyst/

3. Creating a Mac version of your iPad app:

https://developer.apple.com/documentation/xcode/creating_a_mac_version_of_your_ipad_app

4. Optimizing your iPad app for Mac

https://developer.apple.com/documentation/uikit/mac_catalyst/optimizing_your_ipad_app_for_mac

5. Refer to the following sample code projects, which demonstrate how to develop iPad apps with Mac Catalyst:

"UIKit Catalog: Creating and Customizing Views and Controls"

https://developer.apple.com/documentation/uikit/mac_catalyst/uikit_catalog_creating_and_customizing_views_and_controls

"Adding Menus and Shortcuts to the Menu Bar and User Interface"

https://developer.apple.com/documentation/uikit/uicommand/adding_menus_and_shortcuts_to_the_menu_bar_and_user_interface