watchOS 5.3

watchOS

Version

5.3

Build ID

16U5537b

File Size

149.75 MB

Release Date

2019-05-28T17:13:17Z

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 (44mm, LTE) →

About This Update

watchOS 5.3 (build 16U5537b) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-05-28T17:13:17Z. The update package is 149.75 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 df892221b17effc7139747473024c97365b7b4a6.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-67398/39A789A6-7D77-11E9-8D68-D8D17823CFF4/com_apple_MobileAsset_SoftwareUpdate/df892221b17effc7139747473024c97365b7b4a6.zip