watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5110a

File Size

448.74 MB

Release Date

2019-04-29T17:38:37Z

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 1 (38mm) →

About This Update

watchOS 5.2.1 (build 16U5110a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2019-04-29T17:38:37Z. The update package is 448.74 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 e8aaec05fe0d3389ee126057bb3d282369db641d.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-59050/D1F27F6C-686A-11E9-BD35-6DAE78A6FCC2/com_apple_MobileAsset_SoftwareUpdate/e8aaec05fe0d3389ee126057bb3d282369db641d.zip