I have installed V6.4 of Xcode on my Mac Pro, running OS X v10.10.4. I am currently attempting to work through the first programming example called TrackMix from this URL: https://developer.apple.com/library...rstApp_Mac/Articles/ImplementingtheTrack.html I've struggled with new terminology and my poor vision trying to get through this example and after deleting and restarting the exercise at least half a dozen times now, I am to the point where I am ready to enter the section entitled Create Header and Implementation Files for the Track Class When I set highlight the TrackMix directory in the navigator on the left and then go to File > New > File, I am not seeing the same contents as indicated in the example. It says to select the Cocoa template under the OS X section and then select Objective-C class. But I am not finding these options when prompted to choose a template. The options I see under OS X are Source, user Interface, Core Data, Resource and Other. I suspect I've done something incorrectly or am possible missing something that is not yet installed as to what I've found so far.....but I am at a loss as to what i've done wrong or have not installed. Any help or recommendations would be greatly appreciated.