Apple Pushes watchOS 27.0.1 to End Unexpected Restarts on Series 12 & Ultra 4

watchOS 27.0.1 fixes restart glitch

Apple rolled out watchOS 27.0.1 today, a targeted patch for the Series 12 and Ultra 4 models that resolves an intermittent reboot issue reported by users. The update can be fetched via the Settings app on the watch or through the companion iPhone app, but installation only proceeds when the device rests on its charger with a battery level above ↑ 50%.

Key changes are limited to bug remediation, chiefly the unexpected restart bug that could disrupt health tracking and notifications. Apple’s release notes describe the fix as “addressing a condition that may cause the device to power cycle without user input.”

“Our engineers have resolved the instability that caused sporadic reboots,” an Apple spokesperson told Reuters.

Analysts note that swift patching preserves the watch’s premium positioning, especially as competitors accelerate their own wearable roadmaps. For broader context on Apple’s software cadence, see Bloomberg.