Apple to end support for 'legacy' HomeKit architecture with iOS 19

New architecture was introduced in iOS 16

Apple updated support document for Apple Home update procedures.

New banner states:

Support for the previous version of Apple Home will end in the fall of 2025. Update now to avoid interruptions with your accessories and automations.

Update is done through Home app on iPhone, iPad or Mac. Users should upgrade to new Home architecture to prevent devices being unreachable.

Apple Support: Update Apple Home

References:

• Apple confirms iOS 19 will end support for legacy Home app system

• Apple discontinuing support for older Home architecture with iOS 19

• PSA: Apple Ending Support for Old HomeKit Architecture in Fall 2025, Upgrade Before Then