Customers receiving an iPhone 18 Pro, iPhone 18 Pro Max, Apple Watch Series 12, or Apple Watch Ultra 4 tomorrow will need to install a software update immediately.
The iPhone 18 Pro and iPhone 18 Pro Max come with iOS 27 variants with build number 24A427 or 24A8428. The launch version of iOS 27 is version 24A437, so if you get an iPhone 18 Pro, expect a software update during the installation process.
The Apple Watch Series 12 and Apple Watch Ultra 4 have watchOS 27 with a build number of 24R359, but the launch version of watchOS 27 is 24R364.
We also expect the AirPods 5 to have a day one firmware update, although this will be over the air. Apple recently released AirPods 9A350 firmware to add support for iOS 27 features.
All new products are scheduled to launch on Friday, September 18.
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