Apple、デベロッパー向けにiOS 15.6 beta 5 (19G5063a)、iPadOS 15.6 beta 5 (19G5063a)、macOS 12.5 beta 5 (21G5063a)、watchOS 8.7 beta 5 (19U5063a)、tvOS 15.6 beta 5 (19M5062a)を配布開始
https://developer.apple.com/jp/news/releases/