what is macos big sur

macOS Big Sur is the seventeenth major release of macOS, Apple Inc.s operating system for Macintosh computers. It was announced at Apple's Worldwide Developers Conference on June 22, 2020, and was released to the public on November 12, 2020. Some key features of macOS Big Sur include a user interface redesign that features new blurs to establish a visual hierarchy, a revamp of the Time Machine backup mechanism, and support for Macs with ARM-based processors. It is also the first release of macOS for Macs powered by Apple-designed ARM64-based processors. The update provides important security fixes and is recommended for all users.