Just updating an old app, and got the following warning in Transporter.
SDK version issue. This app was built with the iOS 18.2 SDK. Starting April 2026, all iOS and iPadOS apps must be built with the iOS 26 SDK or later, included in Xcode 26 or later, in order to be uploaded to App Store Connect or submitted for distribution. (90725)
The app was built with LiveCode 10.0.3, but the same applies to 10.0.4 (rc 1). Release notes for both state:
The iOS engine is currently built against the iOS 18.2 SDK and building iOS standalones either for simulator or device should work with any recent version of Xcode - a specific iOS SDK is not required.