Apple today seeded a second macOS Big Sur 11.0.1 release candidate to developers for testing purposes, with the new RC coming one week after the first macOS Big Sur RC was released.
The macOS Big Sur beta can be downloaded through the Apple Developer Center and once the appropriate profile is installed, subsequent betas will be available through the Software Update mechanism in System Preferences.
macOS Big Sur introduces a refreshed design to the Mac operating system, overhauling the entire look from the curvature of the window corners to the dock icons to the system sounds. Everything features a lighter and more modern appearance. There’s a new customizable Control Center that mirrors the Control Center on iOS devices, putting key system controls right at your fingertips.
Read more at MacRumors.com