watchOS 5.1.3

watchOS

Version

5.1.3

Build ID

16S5523a

File Size

76.54 MB

Release Date

2018-12-10T18:10:34Z

Update Type

Normal release

Delta update - requires 5.1.2 installed first.

Download OTA

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

About This Update

watchOS 5.1.3 (build 16S5523a) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2018-12-10T18:10:34Z. The update package is 76.54 MB. This is a delta (partial) update that requires 5.1.2 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 aac74e1be768476d9bf79e49729f27c83423fd12.zip.

Direct URL

http://updates-http.cdn-apple.com/2018FallSeed/patches/041-25930/EE9B83E0-F8DD-11E8-90EE-C49098C98897/com_apple_MobileAsset_SoftwareUpdate/aac74e1be768476d9bf79e49729f27c83423fd12.zip