Apple、デベロッパー向けに macOS Big Sur 11.5 beta (20G5023d)、iOS 14.7 beta (18G5023c)、iPadOS 14.7 beta (18G5023c)、watchOS 7.6 beta (18U5523d)、tvOS 14.7 beta (18M5523d)を配布開始
https://developer.apple.com/jp/news/releases/