Installing Xcode
Xcode is a package for developing software for Apple products, including the Macintosh, iPhone, iPad, and more. Even if you’re not a software developer, you need Xcode as a prerequisite for the package manager.
As of OS X Lion, Xcode is a free download from the App Store.[29] Simply search for “Xcode” and download the application. When the Xcode icon appears on your desktop, launch it and follow the installation prompts. When the installation is complete, Xcode is now located in your Applications folder.
[29] For older versions of OS X, download and install Xcode from developer.apple.com. Get Xcode version 3.2.6 for Snow Leopard, 3.1.4 for Leopard, 2.5 for Tiger, or 1.5 for Panther. Some versions of OS X might also include Xcode on their installation DVDs.
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