MacOS Big Sur build 20E5186d

macOS Big Sur build 20E5186d is the official Beta 2 release of macOS Big Sur 11.3, which was released to Apple developers on 2021-02-17.

Changes

 * Redesgined the Support tab of About This Mac. It now includes details on the warranty and a function to start repairs directly from the Mac interface.
 * Added support for WebM video playback in Safari.
 * Added an improvement to the Optimized Battery Charging feature, which allows the Mac to be charged in time for a scheduled calendar event.