Apple's macOS Big Sur and Safari 14 have been introduced with various updates to enhance user experience and security, and the testing platform LambdaTest is offering a preview for developers to test these features before their official release. Big Sur, the first release in the macOS 11 series, boasts a refined design, better security measures, and improved system functionality without relying on third-party kernel extensions. Meanwhile, Safari 14 includes new features like WebExtensions support, HTTP/3, WebP and HDR video playback, and enhanced privacy reporting. It also supports Touch ID and Face ID authentication and offers an automatic one-time password fill from SMS. LambdaTest enables real-time and automated testing for these new versions, allowing developers to ensure website compatibility and functionality across different browsers and screen resolutions. This proactive testing aims to prepare developers for potential changes and ensure seamless website performance once Big Sur and Safari 14 officially launch.