watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S6600b

File Size

66.6 MB

Release Date

2018-02-19T21:17:58Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (38mm) →

About This Update

watchOS 4.2.3 (build 15S6600b) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-02-19T21:17:58Z. The update package is 66.6 MB. This is a delta (partial) update that requires 4.2 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 5686017ce0b00c685eb41b77abc70e236d53b481.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69387-20180219-F0C1CDC6-1311-11E8-AF68-C882E0A71A1F/com_apple_MobileAsset_SoftwareUpdate/5686017ce0b00c685eb41b77abc70e236d53b481.zip