I have installed Xcode 6.1. When I try to run application on iPhone 6/6+ it shows an error 'Unable to boot device in surest state : Creating' and for 6+ it states 'Lost connection to iPhone 6 plus'. I think this is an issue with simulator. I tried to download simulator for the same but only simulator for iOS 7 is available as shown in screenshot. How do I install simulator for iOS 8?
