Download watchOS 6.3 OTA firmware files for different Apple Watches
You can download watchOS 6.3 OTA firmware files for different Apple Watches from this page. Currently, this version of watchOS is supported by Apple Watch Series 1 to 5.
Before downloading any of these OTA updates, note that you cannot restore them via iTunes or 3utools. OTA Updates allows a user of a device to go into Settings > General > Software Update and download and install the latest iOS software on-device, without the need for iTunes.
The device checks an XML-based PLIST file on mesu.apple.com for updates. The updates are delivered in plain unencrypted ZIP files.
Apple Watch series and their firmware identifiers
Apple Watch Series 1
- Watch2,6 = Apple Watch Series 1 (38mm)
- Watch2,7 = Apple Watch Series 1 (42mm)
Apple Watch Series 2
- Watch2,3 = Apple Watch Series 2 (38mm)
- Watch2,4 = Apple Watch Series 2 (42mm)
Apple Watch Series 3
- Watch3,4 = Apple Watch Series 3 (42mm)
- Watch3,3 = Apple Watch Series 3 (38mm)
- Watch3,2 = Apple Watch Series 3 (42mm, LTE)
- Watch3,1 = Apple Watch Series 3 (38mm, LTE)
Apple Watch Series 4
- Watch4,4 = Apple Watch Series 4 (44mm, LTE)
- Watch4,3 = Apple Watch Series 4 (40mm, LTE)
- Watch4,2 = Apple Watch Series 4 (44mm)
- Watch4,1 = Apple Watch Series 4 (40mm)
Apple Watch Series 5
- Watch5,4 = Apple Watch Series 5 (44mm, LTE)
- Watch5,3 = Apple Watch Series 5 (40mm, LTE)
- Watch5,2 = Apple Watch Series 5 (44mm)
- Watch5,1 = Apple Watch Series 5 (40mm)
watchOS 6.3 OTA firmware files
This update provides important security updates and is recommended for all users.
For information on the security content of Apple software updates, please visit this website: