It appears to be correctly signed. Automatically manage signing is checked, my standard team is set. With those settings, as soon as I assign an app group in Xcode 26.1, it changes to an Xcode managed provisioning profile and my valid Apple Development certificate and does not let me change them. I also checked the build with codesign -dv --verbose=4 and in ~/Library/Developer/Xcode/UserData/Provisioning Profiles to verify and that the profiles update, e.g., when I change the Info.plist. I also tried setting up a fresh sample project from the standard multiplatform SwiftUI app template in Xcode and did not change anything in Signing & Capabilities except setting the app group for the app and download extension. Same minimal app just calling AssetPackManager.shared.assetPack(withID:), same result: on iOS it works, on macOS the URL override is not permitted.
Topic:
Developer Tools & Services
SubTopic:
General
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