watchOS 5.2.1

watchOS

Version

5.2.1

Build ID

16U5101c

File Size

471.2 MB

Release Date

2019-04-22T17:13:34Z

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, LTE) →

About This Update

watchOS 5.2.1 (build 16U5101c) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2019-04-22T17:13:34Z. The update package is 471.2 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 c4824de9bc807c9ff454e8bd9d5ee7e66870f710.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-56087/BF660158-6242-11E9-841D-72F356350BEA/com_apple_MobileAsset_SoftwareUpdate/c4824de9bc807c9ff454e8bd9d5ee7e66870f710.zip