watchOS 4.3

watchOS

Version

4.3

Build ID

15T5199f

File Size

324.41 MB

Release Date

2018-03-07T02:04:19Z

Update Type

Normal release

Delta update - requires 4.2.3 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (38mm) →

About This Update

watchOS 4.3 (build 15T5199f) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-03-07T02:04:19Z. The update package is 324.41 MB. This is a delta (partial) update that requires 4.2.3 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 a470b3c2b9af06fc10040cf731750f6dd24d2cc0.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-71035-20180306-ECDE4A72-2180-11E8-AAD1-3070E62A1CD9/com_apple_MobileAsset_SoftwareUpdate/a470b3c2b9af06fc10040cf731750f6dd24d2cc0.zip