Xcode is stuck when trying to refactor a class

Question

Xcode gets stuck if I try to rename a class via refactoring.

It shows "Applying Changes" window and says "Please wait while changes are made." But changes are never made. It's stuck!

How can I solve this problem?

Answer 1

3 years later using Xcode 5, this is still a bug. Only thing to do is file a radar.

Only appears to happen some of the time however, since others have gotten it to rename a class in this SO question - Rename a class in Xcode: Refactor... is grayed out (disabled). Why?