Sauce Labs now supports macOS 12 Monterey with Safari 15, allowing users to test this new version of Safari and the updated macOS features, including a redesigned Safari user interface, Tab Groups, and customization sync. The new capabilities enable users to run tests on the latest Safari version available on Sauce Labs, without specifying a point version, ensuring that web applications are tested on every new browser and operating system as they come out. This practice ensures high-quality application releases by providing coverage and confidence for customers using various browsers and operating systems.