watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5101c

File Size

450.86 MB

Release Date

2019-04-22T17:13:21Z

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 16U5101c) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-04-22T17:13:21Z. The update package is 450.86 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 48c93102cd03640b8b6af237ad38a4e70d051fe6.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-56143/AF1F9BE2-6242-11E9-90CC-F9EF56350BEA/com_apple_MobileAsset_SoftwareUpdate/48c93102cd03640b8b6af237ad38a4e70d051fe6.zip