watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5091b

File Size

443.43 MB

Release Date

2019-04-08T17:12:36Z

Update Type

Normal release

Delta update - requires 5.1.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 5.2.1 (build 16U5091b) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2019-04-08T17:12:36Z. The update package is 443.43 MB. This is a delta (partial) update that requires 5.1.2 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 b7a504cf5637cfb20e24707efcdeff78c5b417e9.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-54487/8CFB0BAA-5716-11E9-B938-3DBAC8039C47/com_apple_MobileAsset_SoftwareUpdate/b7a504cf5637cfb20e24707efcdeff78c5b417e9.zip