I discovered a hidden multi touch gesture on the Macbook track pad that I didn’t know about. At least I haven’t heard of it or seen it documented anywhere. If you drag up or down with 3 fingers on the track pad while you are in the Xcode editor window it will switch to the file’s counterpart. So if you are in a .m file and Xcode will show the associated .h file. If you are in the .h file it will show you the associated .m file. It probably works with other counter parts with other file types. Give it a try.