How to enable/disable ARC in an xcode project?

Question

If a project has already been created with ARC disabled, how do I enable it and vice versa?

Answer 1

In Xcode 5.0.2, select your project in Navigatior, select Build Settings, search for Apple LLVM 5.0 - Language - Objective C and change Objective-C Automatic Refence Counting to NO