Xcode 8 recommend me to change the min iOS Deployment Target from 7.1 to 8.0

I think if the app has many users who are using iOS 7, it would be necessary to adjust project to support iOS 7.

I have tried build, debug, archive with deployment target 7.0 using Xcode 8 Beta(8S128d).

All succeeded. Also successfully export and install the ipa on my iPhone 4 (iOS 7.1.2(11D257)) .

I did the followings to change my project deployment target to 7.0 and remove the suggestion warning.

1. Manually input “7.0” in the “iOS Deployment Target” text box.
   

2. Uncheck the “Update iOS Deployment Target” and press “Perform Changes”https://stackoverflow.com/”Done” button,
   then the recommended suggestion warning will disappear.
   

Edit:

Make Xcode 8.x debug your apps on iOS 7.x devices.

1. You need Xcode 7.x . You can download it from Apple Developer Site.

2. Open Finder, and go to “Xcode 7.x.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/”.

3. Copy “7.0” and “7.1” folders and paste them to “Xcode 8.x.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/”.

4. Open “Xcode 8.x.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/SDKSettings.plist“

5. Add values, “7.0” and “7.1“, to key, “Root/DefaultProperties/DEPLOYMENT_TARGET_SUGGESTED_VALUES“, according to the following screenshot.

6. Restart Xcode 8.x.

7. Now you can choose “7.0” or “7.1” in the “iOS Deployment Target” text box list and debug your apps on iOS 7.x devices.