Rename a class in Xcode: Refactor… is grayed out (disabled). Why?

Question

Why is Refactor... grayed out (disabled) in Xcode?

I\'d like to rename a class.

Answer 1

For me I realized Refactor was disabled because the Xcode project I had opened was referencing a Base SDK that was missing. Edit Project Settings and in the Build tab set the Base SDK to one that you have (like for me this was iOS 4.2). This enabled Refactor for me.