I cannot symbolicate OS X (not iOS) crash logs from testers and users using XCode 4.6 . The crash logs cannot be dragged into the organizer, and the organizer does not show any
I've used MacSymbolicator and Xsymbolicate in cases where I had a dsym and crash report file. They did the job for simply needs, though Xcode's built in crash reporting support has also gotten better, at least for apps sold in the App Store.