Early reports from Apple Watch Series 12 and Ultra 4 users indicate a critical stability issue involving the Apple Neural Engine. Diagnostic logs gathered from affected devices show a consistent 'panic-full' pattern where the Neural Engine hangs for approximately two seconds, triggering a firmware watchdog and a subsequent kernel panic.
Technical Details
- Symptom: Unexpected device reboots.
- Root Cause: Neural Engine timeout leading to kernel panic.
- Affected OS: watchOS 27.0 and subsequent day-one updates.
- Observed Context: Usage of Siri AI, Maps, App Store, and background idle states.
Despite factory resets and unit replacements, the issue persists, suggesting a potential firmware-level or driver-level conflict with the new hardware architecture.
منبع خبر: https://www.macrumors.com/2026/09/21/apple-watch-series-12-ultra-4-reported-reboots/
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