watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S600b

File Size

145.03 MB

Release Date

2018-02-19T21:17:36Z

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 4.2.3 (build 15S600b) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2018-02-19T21:17:36Z. The update package is 145.03 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 417276a717a01cc4fb65e0960165e9f2829cddf9.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69417-20180219-207FB80C-1312-11E8-8A73-1A88E0A71A1F/com_apple_MobileAsset_SoftwareUpdate/417276a717a01cc4fb65e0960165e9f2829cddf9.zip