watchOS 4.3

watchOS

Version

4.3

Build ID

15T5212a

File Size

307.43 MB

Release Date

2018-03-16T20:08:59Z

Update Type

Normal release

Delta update - requires 4.2 installed first.

Download OTA

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

About This Update

watchOS 4.3 (build 15T5212a) is an official Apple over-the-air update for the Apple Watch (42mm), released on 2018-03-16T20:08:59Z. The update package is 307.43 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 e544efcadf7b62da62daeb3767cdb51a7bafc4f5.zip.

Direct URL

http://appldnld.apple.com/watchos4.3seed/091-73358-20180316-D43DE752-27C0-11E8-8744-6D46C3BE6990/com_apple_MobileAsset_SoftwareUpdate/e544efcadf7b62da62daeb3767cdb51a7bafc4f5.zip