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Apple has made available to developers a second build of the macOS Big Sur 11.3 beta.
The latest betas and configuration profiles can be downloaded from the Apple Developer Center, with subsequent changes available as over-the-air updates on enrolled devices.
Apple issued the first beta version of macOS 11.3 on February 2, following after the first betas of Apple's other major operating systems.
Release notes for the first beta advised of changes including redesigned Apple News+ tabs, a Made for You shortcut and live events in Listen Now for Apple Music, sorting changes in Reminders, and bug fixes and improvements.
AppleInsider, and Apple itself, strongly advise users don't install betas on highly-important or primary devices, due to the potential for data loss or other issues. Instead, it is recommended to install betas onto secondary or non-essential devices, and to ensure there are sufficient backups of important data beforehand.