watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5110a

File Size

451.95 MB

Release Date

2019-04-29T17:39:32Z

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 (40mm) →

About This Update

watchOS 5.2.1 (build 16U5110a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-04-29T17:39:32Z. The update package is 451.95 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 9c48ae39bad645b87b3418653a4bf32480550425.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-58833/BF3489CE-686A-11E9-B4F8-2BAC78A6FCC2/com_apple_MobileAsset_SoftwareUpdate/9c48ae39bad645b87b3418653a4bf32480550425.zip