I cant see iOS7 simulator in Settings/Downloads/Components. How can I run my app on iOS7 simulator? I need to make sure everything works on ios7-9!
How can I run my app on iOS7 simulator?
To make a long story short, you can't. You can't use the iOS 7 simulator with Xcode 7. You can use the iOS 7 simulator with Xcode 6, but you can't build your app there. This is in keeping with Apple's stated policy of helping you be backward compatible only one major version backward.
The only solution, therefore is either to give up your goal of backward compatibility to iOS 7 or to test on an iOS 7 device.