MacOS Monterey build 21C5021h

macOS Monterey build 21C5021h is the official Beta 1 release of macOS Monterey 12.1, which was released to Apple developers on 28 October 2021 then to public beta testers one day later. This build is the first to support Navi 23-based graphics cards (RX 6600 / 6600 XT / 6600M / 6700S / 6800S). It is also the first build to include the SharePlay feature which was absent in the initial release of the operating system. This build does not boot on pre-Ivy Bridge processors due to a kernel RDRAND requirement, which was implemented starting with Ivy Bridge processors and newer. This was reverted with the next build.