getIPSW
Apple Watch Series 4 (40mm) Apple Watch Series 4 (40mm) Watch4,1
OTA Update Unsigned 17R5556d

watchOS 6.0

OS
watchOS
Version
6.0
Build ID
17R5556d
File Size
683.78 MB
Release Date
2019-08-07T17:14:48Z
Update Type
Normal release
Delta update - requires 5.2 installed first.

About This Update

watchOS 6.0 (build 17R5556d) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-08-07T17:14:48Z. The update package is 683.78 MB. This is a delta (partial) update that requires 5.2 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is 807aa5b8d29220e200b6c71aa119c6bf28be5cfc.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SummerSeed/patches/041-97390/42E80A68-B797-11E9-AD48-89813F96B74A/com_apple_MobileAsset_SoftwareUpdate/807aa5b8d29220e200b6c71aa119c6bf28be5cfc.zip

Filename

807aa5b8d29220e200b6c71aa119c6bf28be5cfc.zip

Other Devices

© 2026 getIPSW. Firmware data provided by ipswdl.com API. Not affiliated with Apple Inc.