How do I copy an old version of the iOS SDK to a new version of Xcode? -

I have a new version of Xcode I have an iOS device on which a new version of iOS is installed .

I want to make my app with the old iOS SDK, which is using the new version of the encoded.

How?

Not you; The content of the Xcode.app bundle should not be modified.

Any special releases of Xcode include SDK, against which it was qualified, and the use of any other SDK with it is unsupported.