watchOS 5.3

watchOS

Version

5.3

Build ID

16U5526f

File Size

138.86 MB

Release Date

2019-05-15T17:12:34Z

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 16U5526f) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-05-15T17:12:34Z. The update package is 138.86 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 77c9da458db8c133239ac86bdf43c5aa86092158.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-63110/0B034BEE-758E-11E9-B3AC-9DD68657C440/com_apple_MobileAsset_SoftwareUpdate/77c9da458db8c133239ac86bdf43c5aa86092158.zip