Równolegle z premierą nowego firmware 3.1.2, Apple wydało również nową wersją pakietu dla programistów czy SDK. Aktualizacja usuwa kilka błędów związanych z Xcode. Oto lista zmian:

• Xcode 3.2.1 is a bug fix release, see the release notes for further details
• Static code analysis is fully integrated within the Xcode IDE via the Build and Analyze option under the Build menu or via custom build settings
• New Build Results window collects warnings and errors in a persistent log
• GCC 4.2 is the default system compiler for the 10.6 SDK
• The optional LLVM compiler is included using two different front ends – the Clang compiler is a leading-edge parser that offers dramatically improved compile times. For maximum compatibility, the GCC LLVM compiler utilizes the LLVM back-end with the GCC 4.2 parser.
• New opening window for quick access to recent projects