To mark the transition, the operating system's major version number was incremented, for the first time since 2001, from 10 to 11. It is also the first macOS version to support Macs with ARM-based processors. Most notably, macOS Big Sur features a user interface redesign that features new blurs to establish a visual hierarchy and also includes a revamp of the Time Machine backup mechanism, among other changes. īig Sur is the successor to macOS Catalina, and was succeeded by macOS Monterey, which was released on October 25, 2021. It was announced at Apple's Worldwide Developers Conference (WWDC) on June 22, 2020, and was released to the public on November 12, 2020. Performance will vary based on system configuration, network configuration, network connection, and other factors.MacOS Big Sur (version 11) is the seventeenth major release of macOS, Apple Inc.'s operating system for Macintosh computers. Tested with prerelease Safari 14.0.1 and WPA2 Wi-Fi network connection. Tested on preproduction MacBook Air and Mac mini systems with Apple M1 chip and 8-core GPU, as well as production 1.2GHz quad-core Intel Core i7-based 13-inch MacBook Air systems and 3.6GHz quad-core Intel Core i3-based Mac mini systems, all configured with 16GB RAM, 2TB SSD, and prerelease macOS Big Sur. “Up to 1.5x speedier at running JavaScript and nearly 2x more responsive”: Testing conducted by Apple in September and October 2020 using JetStream 2 and Speedometer 2.0 performance benchmarks. Performance will vary based on usage, system configuration, application workload, network connection, and other factors. Page load performance tested using snapshot versions of 10 popular websites under simulated network conditions with prerelease Safari 14.0.1 and Chrome v.121 on macOS.

Tested with prerelease Safari 14.0.1, Chrome v.75, and Firefox v81.0.1 on macOS, as well as Chrome v.75, Microsoft Edge v86.0.622.38, and Firefox v81.0.1 on Windows Home, with WPA2 Wi-Fi network connection. Scores represent browsers that completed the test.

Performance compared to other browsers on Mac and PC using JetStream 2, MotionMark 1.1, and Speedometer 2.0 benchmarks and Windows 10 Home, version 2004, running in Boot Camp. Not all features are available on all devices. Safari tested with HD 1080p content, Chrome and Firefox tested with HD 720p content, all on macOS. Battery life tested with display brightness set to 12 clicks from bottom or 75 percent.

“World’s fastest browser,” “industry-leading battery life,” and “loads frequently visited sites an average of 50 percent faster than Chrome”: Testing conducted by Apple in October 2020 on production 1.4GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB RAM, 256GB SSD, and prerelease macOS Big Sur.

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