watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5113a

File Size

452.1 MB

Release Date

2019-05-07T17:19:29Z

Update Type

Normal release

Delta update - requires 5.1.2 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 16U5113a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-05-07T17:19:29Z. The update package is 452.1 MB. This is a delta (partial) update that requires 5.1.2 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 7b29673e89c76b8ce6afd2c323f39cef9701a3eb.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-60117/5B36935E-6EAA-11E9-9DD8-E770B6DDD32B/com_apple_MobileAsset_SoftwareUpdate/7b29673e89c76b8ce6afd2c323f39cef9701a3eb.zip