title: How to use iOS SDK 4.2 with Xcode 4.0.2
body: <p>I installed Xcode4.0.2 yesterday and attempted to build and run a project developed by someone else, who was using an older version of Xcode (3.2.5) and iOS 4.2.</p>
  
  <p>By default it seems, Xcode sets the project's "Base SDK" to 'Latest iOS (iOS 4.3)'. When I try to change that, my only iOS SDK options are "iOS 4.3" or "Latest iOS (iOS 4.3)". On my machine (Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs) I have "iPhoneSimulator4.2.sdk", as well as one for 3.2, 4.0 and 4.1.</p>
  
  <p>In the Base SDK dialog, I tried choosing "Other..." to set the SDK to something other than the 4.3 options listed. Instead of getting a list of additional installed SDKs I get a text area where I need to manually enter an SDK. I tried "iOS 4.2" but I don't believe that worked.</p>
  
  <p>Why isn't the list of available SDKs being populated with all the ones on my machine, and how can I set the SDK to 4.2?</p>
  
  <p>Thanks!</p>
  
  <p>Mat</p>