watchOS 5.3

watchOS

Version

5.3

Build ID

16U5537b

File Size

169.65 MB

Release Date

2019-05-28T17:12:55Z

Update Type

Normal release

Delta update - requires 5.2 installed first.

Download OTA

Looking for beta firmware? View beta builds for Apple Watch Series 4 (40mm) →

About This Update

watchOS 5.3 (build 16U5537b) is an official Apple over-the-air update for the Apple Watch Series 4 (40mm), released on 2019-05-28T17:12:55Z. The update package is 169.65 MB. This is a delta (partial) update that requires 5.2 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 0db3d0d808e713ba4ff47ed92a4250b35af1129b.zip.

Direct URL

http://updates-http.cdn-apple.com/2019SpringSeed/patches/041-67438/9C3DDEEE-7D77-11E9-8542-BF45BCD7A7D5/com_apple_MobileAsset_SoftwareUpdate/0db3d0d808e713ba4ff47ed92a4250b35af1129b.zip