watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5110a

File Size

136.3 MB

Release Date

2019-04-29T17:39:35Z

Update Type

Normal release

Delta update - requires 5.2 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 2019-04-29T17:39:35Z. The update package is 136.3 MB. This is a delta (partial) update that requires 5.2 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 4e23efb54a691d9f36f4f96551a9c80925310627.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-58966/62032530-686A-11E9-9689-089678A6FCC2/com_apple_MobileAsset_SoftwareUpdate/4e23efb54a691d9f36f4f96551a9c80925310627.zip