Apple's beta day extended to its audio lineup on Monday, with new beta firmware rolling out to a wide swath of current AirPods models. The build, numbered 9B5045a, is available for the AirPods Pro 2, AirPods Pro 3, AirPods 4, AirPods 5, and AirPods Max 2.

As is typical for AirPods firmware, Apple hasn't detailed what the update contains — it's not clear whether the build carries new features, bug fixes, or groundwork for capabilities arriving alongside iOS 27.3, whose first developer beta seeded the same day. The timing suggests the firmware is at minimum keeping pace with the new OS cycle.

The firmware is rolling out to developers, matching the beta cadence of Monday's iOS, iPadOS, and watchOS seeds. AirPods firmware updates install automatically when the earbuds are charging near a paired device, so developer-enrolled users should see the build land without any manual steps. Release notes, if any surface, will likely arrive once the firmware ships publicly.