watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S600b

File Size

583.56 MB

Release Date

2018-02-19T21:17:08Z

Update Type

Normal release

Delta update - requires 3.1.1 installed first.

Download OTA

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

About This Update

watchOS 4.2.3 (build 15S600b) is an official Apple over-the-air update for the Apple Watch (38mm), released on 2018-02-19T21:17:08Z. The update package is 583.56 MB. This is a delta (partial) update that requires 3.1.1 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 408e89fb072f36f8375e7e05eefd8a565a1e565b.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69448-20180219-5308FB76-1312-11E8-8CA9-718DE0A71A1F/com_apple_MobileAsset_SoftwareUpdate/408e89fb072f36f8375e7e05eefd8a565a1e565b.zip