title: Testing ARKit without iPhone6s or newer
body: <p>I am before decision to download Xcode9. I want to play with new framework - ARKit. I know that to run app with ARKit I need a device with A9 chip or newer. Unfortunately I have an older one. My question is to people who already downloaded the new Xcode. There is a possibility to run ARKit app in my case? Any simulator for that or something else? Any ideas or will I have to buy new device?</p>