Apple devices that are running iOS 10 or macOS Sierra no longer meet the minimum system requirements for iCloud, according to Apple’s updated iCloud support document.

iCloud General Feature Redux
All ‌iCloud‌ features now require iOS 11 or macOS High Sierra at minimum. ‌iCloud‌ services like Keychain, iCloud Photos, ‌iCloud‌ backups, Find My, and iCloud Drive will no longer work on devices that are running iOS 10 or macOS Sierra.

iOS 10 and macOS Sierra launched in September 2016, which means the updates are now nine…