macOS® is the operating system that powers every Mac®. It’s designed from the ground up to be easy to use and beautiful to look at. Built on a UNIX foundation, it has the power to take full advantage of the hardware’s capabilities. On a Mac®, it’s easy to find, share, and do just about everything.
One of the best things about a Mac® is that it comes loaded with beautifully designed apps you’ll love to use every day. macOS® High Sierra introduces new core technologies that improve the most important functions of your Mac®. From rearchitecting how it stores your data to improving the efficiency of video streaming to unleashing the full power of your graphics processor, it’s all central to today’s Mac® experience.