Xcode 6 GM creating archive
You have to change your "Code Signing Identity" to "iOS Distribution"
First of all understand that the error message is a BS repurposed message and not accurate to what is happening here. It's not your fault you have wasted so much time on this. This is an example of 1 small flaw in Apple's workflow costing hundreds of thousands of dollars in wasted developer time. But what can we do?
- Make sure you have a VALID Provisioning Profile for Ad Hoc distribution in Developer Member Center and download it to your Mac. (This is an important detail as you probably didn't have one of these prior to Xcode 6 because it wasn't required.)
- Open the *.mobileprovision file by dragging it to the Xcode icon in your dock.
- In Xcode go to Build Settings and find "Code Signing Identity" under "Code Signing".
- It's probably going to be set to "iPhone Developer". Change it to "iOS Distribution", even though that sounds like you're making an App Store build.
- Find "Provisioning Profile" in Xcode under "Code Signing". Make sure that your Ad Hoc provisioning profile is present in the dropdown list, but select Automatic.
- Now you can do: Product > Build; Product > Archive; Export...; And all should be well.
This is technically the same idea as @steventnorris. I wanted to be more clear because I failed recognize and implement his answer. I had to discover this on my own through much trial and error.
Using a development certificate, I was unable to generate an .ipa. However, using a distribution certificate for ad hoc, I could generate an .ipa. I'm assuming this is either a new 'feature' or a bug in Xcode 6 that requires ad hoc to have a distribution certificate and profile to deploy via ad hoc.
The only way I could generate the AdHoc build (without getting rid of my certificates) was using the command line tool xcbuild as described here: