watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5091b

File Size

441.48 MB

Release Date

2019-04-08T17:13:06Z

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 16U5091b) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-04-08T17:13:06Z. The update package is 441.48 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 249759bbc8ceaccec0143271abea727296f44bc2.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-54342/4732F678-5716-11E9-9EAD-F1B4C8039C47/com_apple_MobileAsset_SoftwareUpdate/249759bbc8ceaccec0143271abea727296f44bc2.zip