Fix Library · Submission Requirements — SDK / Xcode version
Upload rejected: app not built with the current required SDK (Xcode 26 / iOS 26)
Your upload is rejected automatically — before any human reviewer — because the build was compiled against an older iOS SDK than Apple currently requires.
Apple said something like
SDK version issue. This app was built with the iOS __ SDK. All iOS apps submitted to the App Store must be built with the iOS 26 SDK or later, included in Xcode 26 or later.
Invalid Binary. This app was built with an older SDK. Starting from a required date, all builds must be built with the current iOS SDK included in the latest release of Xcode.
We identified one or more issues with a recent delivery for your app. Your binary was not built with the required SDK. (Illustrative — the exact error id shown in App Store Connect / the Transporter / altool output varies; do not rely on a specific ITMS number.)
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