Apple、各日本語ページを公開
iOS 13プレビュー
https://www.apple.com/jp/ios/ios-13-preview/
iPadOS プレビュー
https://www.apple.com/jp/ipados/ipados-preview/
watchOS 6 プレビュー
https://www.apple.com/jp/watchos/watchos-preview/
macOS Catalina
https://www.apple.com/jp/macos/catalina-preview/
Mac Pro (2019)
https://www.apple.com/jp/mac-pro/
Pro Display XDR
https://www.apple.com/jp/pro-display-xdr/