Apple releases watchOS 27.0.1 to fix Apple Watch Series 12 and Ultra 4 bug
9to5mac.com Sep 23, 2026

Apple releases watchOS 27.0.1 to fix Apple Watch Series 12 and Ultra 4 bug

AI-summarised brief · reviewed before publication

Apple released watchOS 27.0.1 today to address a bug that caused unexpected restarts on Apple Watch Series 12 and Ultra 4 models. The update, available exclusively for those two series, includes fixes for the restart issue reported by users on forums such as Reddit. Apple confirmed the problem did not affect all devices but acknowledged the need for a patch. The update is now available through the Watch app’s software update section.

💡 Why It Matters

  • · The fix restores reliability for the newest Apple Watch lines, ensuring users can trust the devices for daily use without disruptive power cycles.