watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5091b

File Size

442.25 MB

Release Date

2019-04-08T17:13:18Z

Update Type

Normal release

Delta update - requires 5.1.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (44mm) →

About This Update

watchOS 5.2.1 (build 16U5091b) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-04-08T17:13:18Z. The update package is 442.25 MB. This is a delta (partial) update that requires 5.1.3 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 f12b00f3ac6606c6d67eab0930e6762b350fcd18.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-54499/84B431EC-5716-11E9-B96C-00B9C8039C47/com_apple_MobileAsset_SoftwareUpdate/f12b00f3ac6606c6d67eab0930e6762b350fcd18.zip