watchOS 4.2.3

watchOS

Version

4.2.3

Build ID

15S600b

File Size

187.1 MB

Release Date

2018-02-19T21:18:00Z

Update Type

Normal release

Delta update - requires 4.0 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 3 (42mm) →

About This Update

watchOS 4.2.3 (build 15S600b) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-02-19T21:18:00Z. The update package is 187.1 MB. This is a delta (partial) update that requires 4.0 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 b77204802d1cb4ef5f726309a069e39a1c6e0a2c.zip.

Direct URL

http://appldnld.apple.com/watchos4.2.3/091-69356-20180219-C4552B70-1311-11E8-8EA3-547DE0A71A1F/com_apple_MobileAsset_SoftwareUpdate/b77204802d1cb4ef5f726309a069e39a1c6e0a2c.zip