watchOS 5.3

watchOS

Version

5.3

Build ID

16U5537b

File Size

140.01 MB

Release Date

2019-05-28T17:12:56Z

Update Type

Normal release

Delta update - requires 5.2 installed first.

Download OTA

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

About This Update

watchOS 5.3 (build 16U5537b) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-05-28T17:12:56Z. The update package is 140.01 MB. This is a delta (partial) update that requires 5.2 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 4ae5fa8e43902b6d22d8cfd0a2476cf565438d5e.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-67409/65262F74-7D77-11E9-936E-F65987F7CA0A/com_apple_MobileAsset_SoftwareUpdate/4ae5fa8e43902b6d22d8cfd0a2476cf565438d5e.zip