watchOS 5.3

watchOS

Version

5.3

Build ID

16U5526f

File Size

79.01 MB

Release Date

2019-05-15T17:12:56Z

Update Type

Normal release

Delta update - requires 5.2.1 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm, LTE) →

About This Update

watchOS 5.3 (build 16U5526f) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2019-05-15T17:12:56Z. The update package is 79.01 MB. This is a delta (partial) update that requires 5.2.1 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 20c0bbbb1852070770c0eec1e2e6bb9f9d390fc5.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-63104/D3FA9576-758D-11E9-A8CA-C70D989A8D77/com_apple_MobileAsset_SoftwareUpdate/20c0bbbb1852070770c0eec1e2e6bb9f9d390fc5.zip