Safari is a web browser developed by Apple. It is built into Apple's operating systems, including macOS, iOS, iPadOS and visionOS, and uses Apple's open-source browser engine WebKit, which was derived from KHTML.
Safari 6 ceased support for Windows users, and it was subsequently removed from Microsoft's browser-choice menu (pictured).
macOS, originally Mac OS X, previously shortened as OS X, is an operating system developed and marketed by Apple since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop and laptop computers, it is the second most widely used desktop OS, after Microsoft Windows and ahead of all Linux distributions, including ChromeOS.
Steve Jobs talks about the transition to Intel processors.
An illustration of Apple's M1 processor
OS X Lion was announced at WWDC 2011 at Moscone West.