watchOS 4.3

watchOS

Version

4.3

Build ID

15T5212a

File Size

336.81 MB

Release Date

2018-03-16T20:09:18Z

Update Type

Normal release

Delta update - requires 4.1 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5212a) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-03-16T20:09:18Z. The update package is 336.81 MB. This is a delta (partial) update that requires 4.1 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 af550383a25bd49b12c0c1c0910f208469fcb9ba.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-73506-20180316-B13F8CD2-27C1-11E8-90F6-A163C3BE6990/com_apple_MobileAsset_SoftwareUpdate/af550383a25bd49b12c0c1c0910f208469fcb9ba.zip