Xcode project not showing list of simulators

Question

I open my project in Xcode 6.1. When I try to run the project, the button is grayed out. When I try to go to Product > Clean, the option is grayed out. When

Answer 1

Also check the iOS Deployment Target under build settings. I was using Xcode 6.3 while the deployment target was set to iOS 8.4. I got the list of simulators as soon as I set it to iOS 8.3