# NSApplicationMain(_:_:) Called by the main function to create and run the application. ``` func NSApplicationMain(_ argc: Int32, _ argv: UnsafeMutablePointer?>) -> Int32 ``` ## Parameters `argc` The number of arguments in the `argv` parameter. `argv` An array of pointers containing the arguments passed to the application at startup. ## Return Value This method never returns a result code. Instead, it calls the `exit` function to exit the application and terminate the process. If you want to determine why the application exited, you should look at the result code from the `exit` function instead. ## Discussion Creates the application, loads the main nib file from the application’s main bundle, and runs the application. You must call this function from the main thread of your application, and you typically call it only once from your application’s `main` function. Your `main` function is usually generated automatically by Xcode. ### Special Considerations `NSApplicationMain` itself ignores the `argc` and `argv` arguments. Instead, Cocoa gets its arguments indirectly through `_NSGetArgv`, `_NSGetArgc`, and `_NSGetEnviron` (see ). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)