watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5110a

File Size

452.51 MB

Release Date

2019-04-29T17:39:39Z

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 16U5110a) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm), released on 2019-04-29T17:39:39Z. The update package is 452.51 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 3c2bbe05f0765cf270d85081d7466a0eac21da76.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-59005/BECE6DB0-686A-11E9-AB97-1BAC78A6FCC2/com_apple_MobileAsset_SoftwareUpdate/3c2bbe05f0765cf270d85081d7466a0eac21da76.zip