Mac Os X Direct

The name "Mac OS X" uses the Roman numeral to signify both the version number 10 (following Mac OS 9) and its deep connection to Unix . The OS was born from Apple's 1997 acquisition of NeXT , the company founded by Steve Jobs during his time away from Apple. It is built on the XNU kernel , which combines technology from the Mach microkernel and FreeBSD. Core Architecture

(now known simply as macOS ) is the proprietary operating system developed by Apple Inc. that has powered Mac computers since its official release in 2001. It represented a radical departure from the "Classic" Mac OS (Systems 1 through 9), replacing an aging architecture with a modern, industrial-strength foundation. Origin and the "X" Mac OS X

Allows the OS to manage CPU time between apps, preventing one frozen program from crashing the entire system. The name "Mac OS X" uses the Roman

Mac OS X brought "buzzword technologies" to the Mac that were essential for 21st-century computing: Core Architecture (now known simply as macOS )

Ensures that apps cannot write into each other's memory space, further increasing stability.

Being certified UNIX allows the OS to run a vast array of open-source software and provides a native terminal environment for power users. What OS X has meant to me - Macworld