The com.apple.MobileAsset.MobileAccessoryUpdate.A3184.EA MobileAsset type contains firmware updates for AirPods Max (USB-C).
It's published in mesu for iOS (manifest) and macOS (manifest).
The manifest was first published by 2 April 2025, around when the first firmware update was released.
For the release history of AirPods Max firmware updates, see the OTA Updates/AirPods Max page.
An attempt was made to have a newer asset (com.apple.MobileAsset.MobileAccessoryUpdate.A3184-24E.EA) that was only supported with iOS 18.4 and macOS 15.4 and newer on 31 March 2025, but this appears to have not been implemented on the iOS/macOS side in /System/Library/PrivateFrameworks/MobileAccessoryUpdater.framework/XPCServices/UARPUpdaterServiceLegacyAudio.xpc/Contents/MacOS/UARPUpdaterServiceLegacyAudio.[1]
References
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