watchOS 5.3

watchOS

Version

5.3

Build ID

16U5558b

File Size

166.33 MB

Release Date

2019-06-24T17:25:38Z

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 16U5558b) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2019-06-24T17:25:38Z. The update package is 166.33 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 9b986787b143813df9f2ed226643e9a2e524d1c5.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-73601/52266826-939D-11E9-9F58-8E892A446F1D/com_apple_MobileAsset_SoftwareUpdate/9b986787b143813df9f2ed226643e9a2e524d1c5.zip