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    <p>Xcode 4.2, Apple's integrated development environment (IDE) for Mac OS X and iOS, was released October 12, 2011.</p> <p><strong>Use this tag for questions that are specific to Xcode 4.2</strong>, and not for general programming questions. Use the <a href="/questions/tagged/macos" class="post-tag" title="show questions tagged &#39;macos&#39;" rel="tag">macos</a> or <a href="/questions/tagged/cocoa" class="post-tag" title="show questions tagged &#39;cocoa&#39;" rel="tag">cocoa</a> tags for macOS programming questions; use the <a href="/questions/tagged/ios" class="post-tag" title="show questions tagged &#39;ios&#39;" rel="tag">ios</a> or <a href="/questions/tagged/cocoa-touch" class="post-tag" title="show questions tagged &#39;cocoa-touch&#39;" rel="tag">cocoa-touch</a> tags for iOS (formerly iPhone OS) programming questions; for questions about the Objective-C language and its features, use the <a href="/questions/tagged/objective-c" class="post-tag" title="show questions tagged &#39;objective-c&#39;" rel="tag">objective-c</a> tag; also, avoid adding the Xcode tag if your question would stay the same if you would use any other editor for writing your program code.</p> <h3>New Features:</h3> <ul> <li>support for Mac OS X 10.7 Lion and iOS SDK 5.0</li> <li>Apple LLVM compiler 3.0 with Automatic Reference Counting (ARC)</li> <li>LLVM compiler support for C++’0x features using the new LLVM libc++ standard library</li> <li>Storyboarding support to design multi-view workflows for iOS</li> <li>OpenGL ES graphical debugger</li> <li>Location Simulation</li> </ul> <h3>Note:</h3> <p>Xcode 4.2 is the last version to support Mac OS X 10.6 (Snow Leopard), but is <a href="https://superuser.com/questions/346639/is-there-an-xcode-4-2-for-snow-leopard">only available to registered developers</a>; without an account, 3.2.6 is the latest download that appears for Snow Leopard.</p> <p>Source: Release notes for <a href="https://developer.apple.com/library/content/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html" rel="nofollow noreferrer">Xcode 4.2</a></p> <p>See <a href="/questions/tagged/xcode" class="post-tag" title="show questions tagged &#39;xcode&#39;" rel="tag">xcode</a> for more information.</p>
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