XCode: Could not launch “APP_X_Y” - 'A' packet returned an error: -1

Question

I\'m trying to get my App to work again on the simulator as well as on my device. Before I got this error, I went through an odyssee of XCode signing errors, but right know

Answer 1

None of the other answers helped me.. I wasn't able to launch ANY apps in Xcode 5 until I uncluttered my /etc/hosts file - leaving just the basics...

::1                     localhost
127.0.0.1               localhost
255.255.255.255         broadcasthost
fe80::1%lo0             localhost
10.0.1.100              XYZ.com
2001:470:XXXX::100      XYZ.com

You must edit the file as root, btw... sudo nano /etc/hosts