Project site https://github.com/google/gtm-oauth2
Discussion group http://groups.google.com/group/gtm-oauth2

The Google Toolbox for Mac OAuth 2 Controllers make it easy for Cocoa applications to sign in to services using OAuth 2 for authentication and authorization.

Features include:

• Complete embedded user interface using WebKit
• Works with Google APIs and with any standard OAuth 2 provider
• Handles sign-in, keychain storage of authorization token, and authorizing of requests
• Independent of other projects

To get started with GTM OAuth 2, read the wiki.

If you have a problem or want a new feature to be included in the library, please join the GTM-OAuth 2 discussion group or submit an issue.

The library incorporates the GTM HTTP Fetcher project.

There is a separate project for OAuth 1 controllers.

Other useful classes for Mac and iOS developers are available in the Google Toolbox for Mac.