Apple、デベロッパー向けに macOS Big Sur 11.4 beta (20F5046g)、iOS 14.6 beta (18F5046e)、iPadOS 14.6 beta (18F5046e)、watchOS 7.5 beta (18T5546f)、tvOS 14.6 beta (18L5546f)を配布開始
https://developer.apple.com/news/releases/