If you (like me) wanted all the new bells and whistles in Xcode 8 and realized too late, that the latest officially supported iOS Version of Xcode 8 is iOS 8 and you need support for the iPhone 4 or iPad mini (both run on iOS 7) in one app, here are the good news: You don’t have to go back to Xcode 7 – we built and released a working App for iOS 7 with Xcode 8.
Starting with Xcode 8, the oldest “Deployment Target” offered in the dropdown menu is iOS 8.0. The not-so-well-known part is, you are not limited to the values in the dropdown menu, you can enter whatever you like. I added “7.0” to both, “iOS Deployment Target” in Project and “Deployment target” in Targets, and can confirm we successfully tested the App on iPhone 4 and iPad Mini (1st Gen.), both on iOS 7. Happy end, the app was approved on the App Store.
Let me know in the comments, which iOS version worked for you as well.