macOS Big Sur is an operating system developed by Apple Inc. for its line of Mac computers. Released in November 2020, it introduced a refreshed design with a more spacious layout, rounded corners, and a new control center for easier access to settings. This version also brought significant performance improvements and enhanced privacy features. Notably, it supports the latest Apple Silicon chips, allowing for better integration and efficiency. Additionally, macOS Big Sur includes updates to core applications like Safari, Messages, and Maps, enhancing user experience and functionality.