Apple has seeded the fourth developer betas of its latest operating‑system releases—watchOS 26.6, tvOS 26.6 and visionOS 26.6—into the beta testing ecosystem. The move arrives exactly one week after the third betas landed on developers’ devices, underscoring the company’s steady weekly cadence for incremental updates.

The new betas are available through the Settings app on each device, and because they are developer‑only releases, a free Apple developer account is required to download and install them. Developers can install the betas on Apple Watch, Apple TV and Vision Pro hardware.

Apple has not disclosed any new features in the fourth betas. Historically, each incremental beta contains a handful of bug fixes and performance tweaks, with only occasional feature previews. As a result, developers can focus on stability and compatibility checks before the final release.

For the broader ecosystem, the regular beta cycle keeps the OS stack tight and reliable. Users who rely on the final releases will benefit from smoother animations and fewer crashes, while the industry observes Apple’s phased approach to refining its watches, TVs and vision devices.