watchOS 5.3

watchOS

Version

5.3

Build ID

16U5526f

File Size

82.99 MB

Release Date

2019-05-15T17:12:54Z

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 2019-05-15T17:12:54Z. The update package is 82.99 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 0b6104c43ae4162c66f962b788cbc46fc1c98d74.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-63011/B13E126A-758D-11E9-AC8D-DAAE2150E52B/com_apple_MobileAsset_SoftwareUpdate/0b6104c43ae4162c66f962b788cbc46fc1c98d74.zip