Apple、デベロッパー向けにiOS 26.3 beta (23D5089e)、iPadOS 26.3 beta (23D5089e)、macOS 26.3 beta (25D5087f)、tvOS 26.3 beta (23K5585c)、visionOS 26.3 beta (23N5588c)、watchOS 26.3 beta (23S5586d)、macOS Sonoma 14.8.4 RC (23J305)、macOS Sequoia 15.7.4 RC (24G503)を配布開始
https://developer.apple.com/news/releases/