In what may be the last significant OS X update Apple pushes out before the arrival of Snow Leopard, the company on Wednesday released Security Update 2009-003 to fix flaws in the platform. As with other security updates, this one, known as “OS X.10.5.8,” can be downloaded and installed through Mac users’ Software Update preferences or from Apple Downloads. OS X.10.5.8 has been released to fix flaws in Mac OS X 10.4.11 and 10.5 through 10.5.7. This is the second major OS X security update released this year.