Mac OS is a series of graphical user interface–based operating systems developed by Apple Inc. for their Macintosh line of computer systems. The original operating. OS X (pronounced / ˌ oʊ. ɛ s ˈ t ɛ n originally Mac OS X) is a series of Unix-based graphical interface operating systems (OS) developed and marketed by Apple Inc. Welcome to SecureMac, a site devoted to Apple Macintosh security and Mac OS X Security! Use the Side Bar to navigate the site, check this page frequently for updates. OS X Yosemite features a redesigned interface, powerful built-in apps, and some amazing connections between your Mac and iOS devices. MacUpdate simplifies finding, buying and installing apps for your Mac News, tips, software, reviews, and more for Mac OS X, iPhone, iPad Mac OS X 10.6.3 Snow Leopard, a simpler, more powerful, and more refined version of Mac OS X. It delivers a wide range of enhancements, next-generation technologies. With an elegant design and enhanced features, OS X Yosemite changes how you see your Mac. And what you can do with it. Upgrade for free at the Mac App Store. Download previous versions of VLC for legacy versions of Mac OS X. Use VLC 0.9.10 for 10.4 Tiger. Mac OS X 10.4.7 or later is required. Use VLC 0.8.6i for 10.3 Panther. I sometimes find the Java setup on my various Apple devices to be a mystery. Recently, I was trying to get a Java applet to run in the same way on 2 iMacs and my.