I'm new to Objective-C and the Google API. I'm trying to develop a Mac OS application for browsing Google docs and I'm just going step by step. Following the Google Docs example provided with the gdata-api, I tried to implement the OAuth sign-in webview copying the code in the Google Docs example. The function that handle the OAuth is: Code: - (void)runSigninThenInvokeSelector:(SEL)signInDoneSel So i copied all the code parts need to build the program correctly. When i launch it, it goes correctly in the function and then in the GtmOauth2windowcontroller class like in the Google Docs example, but it doesn't show up the WebView window! The xib of the WebView is referenced in my app as well as the other sources. So I am definitely missing something, maybe some controller. Thanks for help!