watchOS 5.3.3

watchOS

Version

5.3.3

Build ID

16U620

File Size

62.5 MB

Release Date

2019-10-29T17:09:38Z

Update Type

Normal release

Delta update - requires 5.3 installed first.

Download OTA

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

About This Update

watchOS 5.3.3 (build 16U620) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm, LTE), released on 2019-10-29T17:09:38Z. The update package is 62.5 MB. This is a delta (partial) update that requires 5.3 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 a4a38392cee26272806f99af1c112e1e68473415.zip.

Direct URL

http://updates-http.cdn-apple.com/2019FallFCS/patches/061-31971/B73B4D14-F0CF-11E9-A7CB-CF3181BF55A8/com_apple_MobileAsset_SoftwareUpdate/a4a38392cee26272806f99af1c112e1e68473415.zip