Xcode 26 build error: Cannot find '__IPHONE_OS_VERSION_MIN_REQUIRED' in scope

[minlite]

Describe the bug

Building a project that has the amplify dependency on Xcode 26 / iOS 26 results in the following error:

Cannot find '__IPHONE_OS_VERSION_MIN_REQUIRED' in scope

The culprit code seems to be in the AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/ASF/ASFAppInfo.swift file:

  var targetSDK: String {
        var targetSDK: String = ""
#if os(iOS) || os(watchOS) || os(tvOS)
        targetSDK = "\(__IPHONE_OS_VERSION_MIN_REQUIRED)"
#elseif os(macOS)
        targetSDK = "\(__MAC_OS_X_VERSION_MIN_REQUIRED)"
#else
        targetSDK = "Unknown"
#endif
        return targetSDK

Steps To Reproduce

1. Download Xcode 26
2. Add amplify sdk as dependency
3. Build

Expected behavior

Code builds without any issues

Amplify Framework Version

2.42.1

Amplify Categories

Auth

Dependency manager

Swift PM

Swift version

5.3

CLI version

NA

Xcode version

26 Dev Beta 1 (17A5241e)

Relevant log output

<details>
<summary>Log Messages</summary>


amplify-swift/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/ASF/ASFAppInfo.swift:19:24: error: cannot find '__IPHONE_OS_VERSION_MIN_REQUIRED' in scope
        targetSDK = "\(__IPHONE_OS_VERSION_MIN_REQUIRED)"

</details>

Is this a regression?

Yes

Regression additional context

No response

Platforms

iOS

OS Version

iOS 26 Dev Beta 1

Device

iPhone 15 Pro

Specific to simulators

No response

Additional context

No response

[deivymejiaruiz]

someone fix it?

[thisisabhash]

Thank you for posting this - our team will take a look and post updates here.

[egesucu]

Issue is also present on 2.48 with the lates 5.X. It's only on Xcode 26 Beta for now.

[harsh62]

Xcode 26 Beta Support

For users experiencing compilation issues, we've created a work-in-progress branch to help with testing: xcode26-beta

Using the WIP Branch

Add the following branch via Swift Package Manager: xcode26-beta

Important Notes

• Beta Software: Xcode 26 is currently in beta and has not undergone full testing
• Best Effort Updates: Our team will update this branch as new beta releases become available, but updates are provided on a best-effort basis
• Potential Issues: You may encounter regressions or unexpected behavior due to the beta nature of both Xcode 26 and this branch

⚠️ Production Warning

DO NOT use this branch in production environments. This branch is intended solely for testing and development purposes with Xcode 26 beta.

Getting Started

1. Add the package dependency using the xcode26-beta branch
2. Test your application thoroughly
3. Report any issues you encounter to help us improve compatibility

We appreciate your patience as we work to ensure compatibility with the upcoming Xcode release.

[chadjholmes]

@harsh62

For users experiencing compilation issues, we've created a work-in-progress branch to help with testing: xcode26-beta

This is working like a charm! Thanks for the quick work - will be looking forward to the release