XCode 4.5 (4G182) + iPhone 5 iOS6 - Choose a destination with a supported architecture in order to run on this device
I have found the same issue while running an OLD project on XCode 5.0 and My solution is:
You need to do following steps for getting out with this:
1. Set Valid Architectures : armv7,armv7s
2. Set compiler as LLVM in Project ---> Build Settings ---> Build Options.
3. Set Base and Deployment sdk properly.
This is my solution. Happy To Help.