iOS 16.4 could mark Apple's second attempt at rolling out its overhauled Home architecture.

According to internal code identified by MacRumors, Apple is reportedly already testing a new iteration of its revamped Home app architecture. This app is integral to controlling HomeKit-compatible smart home devices.

Apple initially attempted to introduce this new architecture with the release of iOS 16.2 in December 2022. At that time, while some users upgraded without incident, many encountered significant issues such as "HomeKit devices stuck in an 'updating' or 'configuring' status, devices going missing entirely, failures in sharing the Home app with other users, and malfunctioning HomeKit Secure Video recording," among other problems.

Consequently, Apple removed the update capability for the new architecture and has not reintroduced it since. It's possible that if your HomeKit-enabled ceiling fan ceased functioning, this ill-fated update could be the reason.

Apple is looking to re-release it soon

There was anticipation that the updated architecture would be included in iOS 16.3, but that version launched yesterday without such an update.

Thus far, Apple's only communication on the matter has been that the architecture upgrade will "return soon." Given the recent leaks indicating internal testing, there's a strong likelihood that this update will be part of iOS 16.4. However, there are no official details regarding the release timeline for this next iPhone software version.

If the release is indeed planned for iOS 16.4, we should be able to confirm it when the developer beta becomes available. With iOS 16.3 now live, the first beta for iOS 16.4 could be released as early as this week.

The new architecture will capitalize on the enhanced automation features brought by the temperature and humidity sensors in the latest HomePod and HomePod mini. Apple activated these sensors with HomePod software version 16.3, which was launched earlier today.