Game does not run through Xcode

I used Build and Run to run my game through Xcode but it shows as below.

32992-qq20140927-1.png

Then i plugged my iPhone which runs on IOS8, it started to request for Apple Developer account. I don’t really understand why this happened.

I am runing 6.0.1 Xcode and ios8 but i don’t have developer account. Therefore, i try to run on emulator but i can’t select a device from the tab.

please see this forum conversation for a solution:
http://forum.unity3d.com/threads/ios-simulator.183097/

“Player settings > Other settings > SDK version > Simulator SDK”

as far as i remember it worked for me,

However this is the official unity answer (no) :
http://docs.unity3d.com/Manual/iphone-basic.html
Can Unity-built games run in the iPhone Simulator?

A: No, but Unity iOS can build to iPad Simulator if you’re using the latest SDK. However the simulator itself is not very useful for Unity because it does not simulate all inputs from iOS or properly emulate the performance you get on the iPhone/iPad. You should test out gameplay directly inside Unity using the iPhone/iPad as a remote control while it is running the Unity Remote application. Then, when you are ready to test performance and optimize the game, you publish to iOS devices.

If you don’t have a developer account then you cannot run on an iOS Device. As far as i know you can’t run a Unity game through the iOS emulator.