I’ve been a little lax about keeping SBCL up to date but when I saw the announcement for SBCL 1.3.17, I downloaded, compiled, and installed it before I forgot. You can get your copy here. I always build from source but there are also binaries (for some systems) available.
I’m happy to report that it builds without problems on my Macs and passes the regression tests with no unexpected failures. As I say with every release, if you’re looking for a really good Common Lisp environment, look no further. SBCL produces excellent native code, is completely open source, and is under constant development and improvement.