watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S600b

File Size

132.78 MB

Release Date

2018-02-19T21:17:09Z

Update Type

Normal release

Delta update - requires 4.1 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 2018-02-19T21:17:09Z. The update package is 132.78 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 bb71c507a978d00e53c18f3a13244981b01b72b1.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69278-20180219-6A4FA6B4-1311-11E8-AB51-E470E0A71A1F/com_apple_MobileAsset_SoftwareUpdate/bb71c507a978d00e53c18f3a13244981b01b72b1.zip