Uploading an iOS app built with the public release of Xcode 27.2 (27B52) fails with this error (code 90534 / ITMS-90534 in the upload logs):
Unsupported SDK or Xcode version. Your app was built with an SDK or version of Xcode that isn't supported. Although you can use beta versions of SDKs and Xcode to build and upload apps to App Store Connect, you need to use the latest Release Candidates (RC) for SDKs and Xcode to submit the app. For details on currently supported SDKs and versions of Xcode, visit: https://developer.apple.com/news/releases.
The upload itself completes; the error is returned afterward by App Store Connect when Xcode checks the upload's status, so this looks like server-side validation not yet recognizing the final 27B52 build. As of today, developer.apple.com/news/releases lists Xcode 27.2 RC (27B48) but not Xcode 27.2 (27B52).
Archive metadata (app and all extensions match):
- DTXcode: 2720
- DTXcodeBuild: 27B52
- DTSDKName: iphoneos27.2
- DTSDKBuild: 24B8118
- Deployment target: iOS 26.0
- No embedded third-party frameworks
- Uploaded via Xcode Organizer (ContentDelivery 27.10.4-2.2), macOS 27.2 (26B123)
Local setup checked:
- Only one Xcode installed (27.2, 27B52); xcode-select points to it; no DEVELOPER_DIR or SDKROOT overrides
- Reproduced after a clean build and a fresh archive
Upload error IDs:
- JITIPJCXJDJFKY7RQZS6GAWAGM (Oct 30, 2026)
- 2D3BNQAYTYPEPADRSCS4XCHZME (Oct 30, 2026, after a clean rebuild)
Can Apple confirm whether Xcode 27.2 (27B52) is accepted for App Store submission, or whether builds should use 27.2 RC (27B48) until it is?
