watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S600b

File Size

559.01 MB

Release Date

2018-02-19T21:17:35Z

Update Type

Normal release

Delta update - requires 3.2.2 installed first.

Download OTA

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

About This Update

watchOS 4.2.3 (build 15S600b) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-02-19T21:17:35Z. The update package is 559.01 MB. This is a delta (partial) update that requires 3.2.2 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 f61594e55ccf141d56fdfa2b600e0c7aecf85579.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69451-20180219-6679FD5E-1312-11E8-AC13-0490E0A71A1F/com_apple_MobileAsset_SoftwareUpdate/f61594e55ccf141d56fdfa2b600e0c7aecf85579.zip