How to add an existing framework in Xcode 5

Click on your project in the Project Navigator on the left side. In General go to "Linked Frameworks and Libraries". Click on the + button

and click on "Add Other" and then add the framework you have downloaded.

Strange. I was just doing the same thing in XCode 5.0.2 and I had to click on the Project, select the *Tests Target, then select not the General tab but actually the Build Phases tab to see "Link Binary With Libraries" where I was able to add the framework.