Apple Seeds Second Beta of Upcoming watchOS 5.1.3 Update to Developers
Apple today seeded the second beta of an upcoming watchOS 5.1.3 update to developers, a little over a week after seeding the first beta and nearly two weeks after releasing watchOS 5.1.2.
Once the proper configuration profile has been installed from the Apple Developer Center, the new watchOS beta can be downloaded through the dedicated Apple Watch app on the iPhone by going to General --> Software update.

To install the update, the Apple Watch needs to have at least 50 percent battery, it must be placed on the charger, and it has to be in range of the iPhone.
As a minor 5.1.x update, watchOS 5.1.3 likely focuses on addressing issues that weren't able to be fixed with watchOS 5.1.2. No new changes were found in the first beta of watchOS 5.1.3, but we'll update this post if we find new features in the second beta.
The prior watchOS 5.1.2 update introduced the long-awaited ECG feature for the Apple Watch Series 4, allowing Apple Watch owners to take single-lead electrocardiograms to detect atrial fibrillation, which can be a sign of serious health problems.
Popular Stories
On this week's episode of The MacRumors Show, we discuss Google's latest wave of announcements for Android and Gemini, the newly announced Fitbit Air, and Apple Watch Series 12 rumors.
Subscribe to The MacRumors Show YouTube channel for more videos
The centerpiece of Google's announcements this week was Gemini Intelligence, Google's new umbrella platform for AI across phones, watches, cars,...
Apple will unveil watchOS 27 during its WWDC 2026 keynote on Monday, June 8, and a handful of new features have been rumored already.
The first developer beta of watchOS 27 should be available immediately following the keynote, and a public beta typically follows in July. The update should be released to all users with a compatible Apple Watch model in September.
Below, we recap watchOS...
For many years now, it has been rumored that the Apple Watch will eventually gain non-invasive blood sugar monitoring capabilities, which would enable millions of people with diabetes to track their blood glucose levels without needing to prick their skin with a needle or wear a dedicated continuous glucose monitor.
According to Bloomberg's Mark Gurman, Apple recently shifted oversight of...