Apple seeded the sixth beta of watchOS 27 to developers, a week after the fifth beta. The beta downloads via the Watch app on iPhone with a free developer account. Installation requires the watch to be on charger, connected to Wi‑Fi, and have at least 50% battery.

watchOS 27 introduces Siri AI, a smarter, more capable version of Siri that can hold back‑and‑forth conversations and access general world knowledge and personal data. Siri AI on Apple Watch requires an iPhone that supports Apple Intelligence, including the iPhone 15 Pro and later.

A Dynamic app grid highlights Siri‑suggested apps, and Smart Stack Suggestions add intuitive assistance. Users can locate their parked car, view pinned messages, get noise alerts, and access identity and transit cards. Liquid Glass improves legibility, and Workout Buddy works on the watch without an iPhone, adding progressive metrics for distance, pace, or duration. The new all‑in‑one Find My app supports Precision Finding, and performance tweaks boost battery life.

Additional details are available in the watchOS 27 roundup, along with related roundups for watchOS 26 and watchOS 27, and a forum thread for discussion.