GitHub has introduced a new "Open in Xcode" button that allows users to easily pull code directly into Xcode from a GitHub repository, particularly for projects containing .xcodeproj or .xcworkspace files. This feature, announced in conjunction with Apple's latest Xcode 9 release at WWDC, leverages GitHub integration developed by Apple. Once users authenticate their GitHub accounts within Xcode, the button becomes visible on relevant repositories, enabling them to launch Xcode and clone the repository to their local machine by selecting a directory. This new functionality enhances the seamless transition from browsing code online to experimenting with it in a local development environment.