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

Also, it could happen that you renamed the filename for the class, either outside xcode or by ctrl-clicking the filename and then renaming it. xcode refuses to refactor if filename does not match with the class name.