watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5091b

File Size

153.85 MB

Release Date

2019-04-08T17:13:10Z

Update Type

Normal release

Delta update - requires 5.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.2.1 (build 16U5091b) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-04-08T17:13:10Z. The update package is 153.85 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 2a2f93f3f604b70680baac78a5f855551d1610c8.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-54382/07189890-5716-11E9-8752-19A7C8039C47/com_apple_MobileAsset_SoftwareUpdate/2a2f93f3f604b70680baac78a5f855551d1610c8.zip