Apple's April 28 SDK Deadline Lands Tuesday, Forcing Every App Store Submission Onto Xcode 26 and the iOS 26 Toolchain
Starting April 28, 2026, App Store Connect will reject any app or update not built with the iOS 26, iPadOS 26, tvOS 26, visionOS 26, or watchOS 26 SDK, requiring developers to migrate to Xcode 26.
Overview
Apple’s annual SDK floor for the App Store rises on Tuesday. Starting April 28, 2026, every app or game uploaded to App Store Connect must be built with the iOS 26, iPadOS 26, tvOS 26, visionOS 26, or watchOS 26 SDK, according to Apple’s developer announcement. In practice, that means submissions compiled with Xcode 25 or earlier will be rejected at upload, and developers who have not yet moved their build pipelines to Xcode 26 have only days left to do so.
The change affects new submissions and updates only. Existing apps already on the App Store remain available, and the deadline does not force developers to raise their minimum supported iOS version. Apps built with the iOS 26 SDK can still target older iOS releases as their deployment floor, as 9to5Mac noted in its February coverage of the requirement.
What We Know
The new minimum requirements are listed by platform on Apple’s Upcoming Requirements page, which sets a single April 28, 2026 effective date for iOS 26, iPadOS 26, tvOS 26, visionOS 26, and watchOS 26 SDKs. macOS is not mentioned in the announcement, as Apple’s developer news page makes clear. Apple frames the move as a routine refresh: the prior cycle, set on April 24, 2025, required Xcode 16 and the iOS 18 SDK, per the same Upcoming Requirements page.
Because the requirement targets the build toolchain, developers will need Xcode 26. Apple’s Xcode system requirements page lists macOS Sequoia 15.6 as the minimum host operating system for Xcode 26 through 26.3, with Xcode 26.4 raising the bar to macOS Tahoe 26.2. That detail matters for teams running older Mac hardware or constrained CI pipelines, since they may need to bump their build agents before the SDK migration itself can proceed.
A second consequence of the April 28 deadline is visual. By default, apps built with the iOS 26 SDK adopt Apple’s new Liquid Glass design language across native UIKit and SwiftUI components, including navigation bars, tab bars, buttons, and sheets. 9to5Mac reported that developers can opt out of the new appearance, so the SDK requirement on its own does not force a redesign — only a recompile.
Apple’s Upcoming Requirements page also lists a separate January 31, 2026 deadline already in effect: developers must respond to updated age-rating questions for each of their apps, with the new rating system aligned to the iOS 26, iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, and watchOS 26 release cohort. Submissions can be interrupted in App Store Connect until those responses are filed.
What We Don’t Know
Apple has not published figures on how many existing apps would fail the new check if uploaded today, nor has it disclosed how many active developers have already migrated to Xcode 26. The company does not break out App Store Connect submission rejection rates by category, so it is unclear how disruptive the cutover will be for long-tail apps that ship infrequent updates and may have skipped the prior Xcode 16 cycle.
It is also unclear how strictly the cutover will be enforced for builds submitted in the hours surrounding the April 28 boundary. Apple’s announcement and its Upcoming Requirements page both say the requirement begins on that date but do not detail a grace period for in-flight reviews. Developers seeking clarification have largely been pointed back to Apple’s submitting apps documentation, which the Upcoming Requirements page cites as the canonical resource.
Finally, Apple has not committed to a public timeline for when Liquid Glass opt-out flags themselves will be retired. Today’s deadline only mandates building against the new SDK; the design language remains optional for developers who explicitly disable it. Whether and when that escape hatch closes is a question for a future Xcode cycle, not this one.