watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5079d

File Size

439.81 MB

Release Date

2019-03-28T17:11:32Z

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 16U5079d) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-03-28T17:11:32Z. The update package is 439.81 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 7f3c3b1a174ccb0776fff80a8e3638ee69745d64.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-48073/147A1888-4C26-11E9-A0D5-DE5A777B68CB/com_apple_MobileAsset_SoftwareUpdate/7f3c3b1a174ccb0776fff80a8e3638ee69745d64.zip