The com.apple.MobileAsset.MobileAccessoryUpdate.A2119-22G
MobileAsset type contains firmware updates for the Apple USB-C Digital AV Multiport Adapter.
It's published in mesu for iOS (manifest) and macOS (manifest).
It was first discovered on 19 May 2024
but almost certainly existed earlier.This seems to be a newer version of com.apple.MobileAsset.MobileAccessoryUpdate.A2119
.
Based on the name, it might be that this asset is used since macOS 13.5 (22G74).
Software
On macOS, this asset is downloaded by /System/Library/PrivateFrameworks/MobileAccessoryUpdater.framework/XPCServices/USBCAccessoryUpdaterService.xpc/Contents/MacOS/USBCAccessoryUpdaterService
,
which also handles installing the firmware update into the accessory.
On macOS 13, it has "A2119-22G" hardcoded; there isn't any check for "if foo then get A2119 instead".