"Mac OS X includes many open source projects that contribute to the stability and robustness of the system. While Apple provides working versions of these for both PowerPC and Intel architectures, sometimes you want to build your own to tune performance or enable custom features. Plus, distributing a single binary is often preferable to keeping track of separate, architecture-specific binaries. These objectives can be accomplished by building the project as a Universal Binary, a file that contains code for both the PowerPC and Intel architectures." This article shows how to use Xcode (using Xcode 2.2.1) to construct a make-based project that builds OpenSSL as a Universal Binary."