Device build fails after upgrading to Xcode 8

Question

Since upgrading to Xcode 8 I cannot run any app on my iPhone. The build fails with error:

error: Task failed with exit 0 signal 11

Answer 1

If you still face this issue and you have upgraded to MacOS Sierra. You can look in the keychain and delete a system key named "1". This solved my problem "Task failed with exit 0 signal 5"