watchOS 4.3

watchOS

Version

4.3

Build ID

15T5187e

File Size

373.25 MB

Release Date

2018-02-21T18:11:55Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 1 (42mm) →

About This Update

watchOS 4.3 (build 15T5187e) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-02-21T18:11:55Z. The update package is 373.25 MB. This is a delta (partial) update that requires 4.0 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 8db22717886f002fb25a7e207d02479513bfcede.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-70191-20180222-F547B93E-1341-11E8-BA95-14D870E8E01E/com_apple_MobileAsset_SoftwareUpdate/8db22717886f002fb25a7e207d02479513bfcede.zip