If you’ve got this problem, check your Info.plist for UIRequiredDeviceCapabilities. Remove them, and try again. That fixed it for me.
Another thing to try: set your iPhone OS (iOS) Deployment Target to 3.0 (or as low as necessary for the device you want to run on). In Xcode 4, a Deployment Target that’s higher than the iOS device’s iOS version can cause the Run to fail silently.
Thank you so much for this.
This also fixed my issue!
I spent a total of about 10 hours on this. Your fix was the fix that did it.
After a lot of frustration and a lot of looking around your post saved me what could have been endless additional wasted time. Thank you so much.