App installation failed

Question

In Xcode 6 Beta 5, when I attempt to run my app after building, I receive an error dialog that says:

App installation failed

Answer 1

Problem: Few times, if you add app extension where you have file and info plist, extension's file and plist are assigned to target, is wrong causes issue rises. Solution: Extension's all file should be assigned in App Extensions target, and info plist should not be assigned to any target.

Answer 2

I had this problem. Solution is to uninstall the app. Then clean project and then install app.

Answer 3

I have had this happen to me about 3 times since moving to Beta 5 and Xcode beta 5. I usually navigate to my Organizer and select Projects. Find your project on the left and delete it. Next I close Xcode and restart both my Mac and my Testing Device! Has helped every time!