Apologies for the naivety of this question and my newness to XCode. If this is not the correct forum please advise... I have a number of XCode 3.2.3 test apps that worked fine. On a fresh Mac Mini that has only has XCode 4.0.1 they generate pathing problems. If I create a new app it puts it on the desktop and appears to work. With the old apps on the new machine... Run as from the Desktop . Foundataion.framework - Required UIKit.framework - Required CoreGraphics.framework - Required Run from a folder under Development #import <UKKit/UIKit.h> No such file or directory In File/Project Settings I don't have an option under the Build tab to change the SDK path. N.b. The "Test" apps are the ones supplied with the Dudley and Adamson book "iPhone SDK Development".