Security is increasingly on the mind of many a Mac user, and Apple’s latest security patches for Mac OS X Leopard and Mac OS X Snow Leopard patch a variety of holes that could be exploited by unscrupulous folks. Alongside the Mac OS X 10.6.8 update released on Thursday, Apple also provided Security Update 2011-004, which brings some of the same patches to Leopard, as well as fixing some Leopard-specific security bugs.