watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S600b

File Size

618.74 MB

Release Date

2018-02-19T21:17:39Z

Update Type

Normal release

Delta update - requires 3.0 installed first.

Download OTA

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

About This Update

watchOS 4.2.3 (build 15S600b) is an official Apple over-the-air update for the Apple Watch Series 1 (42mm), released on 2018-02-19T21:17:39Z. The update package is 618.74 MB. This is a delta (partial) update that requires 3.0 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 ffcc18e13693e7a224cfb94a2d3ff39f2652c2b1.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69401-20180219-16A4EEF6-1312-11E8-B1E5-AE86E0A71A1F/com_apple_MobileAsset_SoftwareUpdate/ffcc18e13693e7a224cfb94a2d3ff39f2652c2b1.zip