Unverified50% confidenceFactExact time
Passkeys introduced in macOS Sonoma and iOS 17 rely on iCloud Keychain for cross-device synchronization.
1
Sources
50%
Confidence
Long-term
Relevance
8/4/2026
First Seen
Sources
苹果Mail发送非iCloud邮件时为何连接iCloud服务器？原因解析
Related Claims
UnverifiedThe three major platforms—Apple, Google, and Microsoft—have jointly adopted Passkey support, with authentication credentials automatically synced via each platform's cloud keychain.75% similarUnverifiedApple iCloud Keychain, Google Password Manager, and Windows Hello already support syncing Passkeys to multiple devices under the same account via end-to-end encryption75% similarUnverifiedmacOS keyboard text replacement settings can be synced to iPhone via iCloud, making these shortcuts equally effective on mobile.72% similarUnverifiedApple Magic devices use Bluetooth Low Energy (BLE) protocol to establish an exclusive binding relationship with a Mac, with the pairing key stored in the system's Bluetooth configuration profile.72% similar
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