When I try to update the software on my Apple Watch Ultra I get an error message saying I need to update the software on my iPhone 8 Plus first. However, the iPhone says its software is up to date v. 16.7.3 Any suggestions? Thanks
Apple Watch Ultra, watchOS 9
Apple Watch Ultra (with watchOS 9), Apple Watch Series 8, and Apple Watch SE require an iPhone 8 or later with iOS 16 or later.
Apple Watch Ultra - Technical Specifications
However, Apple Watch Ultra 2 (or an Ultra that has been updated to watchOS 10), Apple Watch Series 9, and Apple Watch SE require iPhone Xs or later with iOS 17 or later.
Apple Watch Ultra 2 - Technical Specifications
iOS 16.7.3 is the most an iPhone 8 can be updated to. It cannot be updated to iOS 17 to allow the watch to be updated to watchOS 10.
Apple Watch Ultra (with watchOS 9), Apple Watch Series 8, and Apple Watch SE require an iPhone 8 or later with iOS 16 or later.
Apple Watch Ultra - Technical Specifications
However, Apple Watch Ultra 2 (or an Ultra that has been updated to watchOS 10), Apple Watch Series 9, and Apple Watch SE require iPhone Xs or later with iOS 17 or later.
Apple Watch Ultra 2 - Technical Specifications
iOS 16.7.3 is the most an iPhone 8 can be updated to. It cannot be updated to iOS 17 to allow the watch to be updated to watchOS 10.
Thanks!
Update Apple Watch Ultra software update
