Although Snow Leopard still powers about a third of all Macs, Apple has likely halted security updates for that edition.
Today's Java patch was the first Apple update for OS X Snow Leopard since June 12. The OS X patches for the three Java 7 flaws, then, were produced by Oracle and shipped last week alongside the fixes for the Windows version of Java 7. However, Apple is not responsible for Java 7 the company handed back control of the software to Oracle in 2010. Apple was required to provide the defense-in-depth update because it still maintains Java 6, which it bundled with 2009's OS X Snow Leopard and offered to users running 2011's Lion as an optional download when they encountered a Java applet on the Web.
