When I archive and distribute any iOS app from Xcode 27.0 RC on macOS 27.0 Golden Gate, the upload stalls indefinitely at “Preparing to upload [App].ipa”. The archive, signing, provisioning, IPA packaging, and App Store Connect authentication all complete successfully.
This is reproducible with multiple unrelated iOS projects on the same machine, so it does not appear to be caused by a specific app, signing configuration, asset, or bundle identifier. Cancelling the upload is the only way to exit the stalled state.
I also checked with ChatGPT Codex if it can narrow down the issue. It states: "The failure occurs when Xcode launches the swinfo utility from the ContentDelivery framework to generate the asset description.swinfo crashes with SIGSEGV / exit code 139. The crash report reports:Thread stack size exceeded due to excessive recursion".
But I actually never got an error message during the upload itself, it just hangs indefinitely at "preparing to upload..." (Tried it several times up to 36h).
This issue is new since I updated to macOS Golden Gate and xCode 27 RC. Xcode Cloud is the only working option right now to upload a Build to App Store Connect. Anyone experiencing the same issue and found a solution?
What I already tried: Revoke and renewed my Apple Distribution certificate.
Delete xCode, Installed it again (I also installed xCode 27.2 Beta which I knew would not work to upload an app to App Store Connect from a Beta version).
Created a brand new project and tried to upload this. Also hang at "preparing to upload..."