Apple has issued a minor update to the iOS 26 developer beta 6, but the release has left many Apple Watch users disappointed. The update only changes the build number, moving from 23A5318c to 23A5318f, and introduces no visible new features.
The Blood Oxygen Sensor Issue
One of the biggest questions surrounding this update is the Apple Watch’s blood oxygen sensor. Earlier this week, Apple successfully restored the feature on certain devices through iOS 18.6.1 and watchOS 11.6.1, sidestepping patent restrictions imposed by medical technology firm Masimo. However, the iOS 26 developer beta has yet to deliver the same fix.
The feature was disabled in Apple Watch models sold in the U.S. after January 2024 due to an import ban. While older devices retained the sensor, newer models shipped with the feature turned off via software. Apple’s workaround for iOS 18.6.1 demonstrated that the sensor could return without violating restrictions, raising expectations for the beta update.
No Immediate Change for Beta Testers
So far, developers testing iOS 26 have not seen the blood oxygen sensor return. Some speculate that Apple may activate it later through a backend push rather than a software patch. Still, as of now, there are no reports of the feature reappearing in beta builds.
What Users Can Do
For those not on the beta track, updating to iOS 18.6.1 and watchOS 11.6.1 remains the best option to restore the blood oxygen function. Users can access these updates through the Settings app under “General” and “Software Update.”
As Apple continues to refine iOS 26, the company’s decision to leave out the feature in its latest developer release leaves developers waiting and watching. Whether the fix eventually arrives in beta form or only in public releases remains to be seen.
