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I doubled checked the Debug Information Format setting for my main target and it's set to DWARF with dSYM File. (Screenshot included.)
I also did a new archive for both iOS and Mac (Catalyst), with no code or configuration changes between the two aside from the build number. When I inspect the contents of the archives, the dSYM for the main app is present in the iOS archive, but not the Mac archive. I'm using Xcode 13.3.1 and MacOS 12.3.1.
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The first thing I tried was using the built-in Xcode crash reports in the Organizer. I assumed that since Xcode has access to the archives and is fetching the crash reports itself, it would be able to locate and use the appropriate dSYMs, but I see unsymbolicated entries for the parts of the stack trace that are in my app.
So that led me to trying to symbolicate manually. I looked up the UUID and then used this, which produced no output:
mdfind "com_apple_xcode_dsyms_uuids == E49A5EB3-C560-3895-B2AE-4CEE263E45CA"
Next I tried looking in the archive for the dSYM itself. I right-clicked on the archive in the Xcode organizer and chose Show in Finder, then used Show Package Contents on the xcarchive. In the dSYMs folder, I see dSYM files for some frameworks the app uses, as well as some of its extensions (intents, widgets) but there isn't a dSYM for the app itself.
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Yes, exactly - the version in the Mac App Store uses the same codebase as the iOS app (with a few Mac-specific tweaks) via Mac Catalyst.
I received a response to Apple developer support seeming to confirm that updates remain available:
If you are dropping support for iOS12, as long as the latest version that is compatible with iOS12 has not been removed in App Store Connect, users who are running iOS12 will be able to update to the latest version that is compatible with their device.
This doesn't seem to be documented anywhere, but it looks like in iOS 13 beta 4 there's a new `NSPersistentCloudKitContainer.initializeCloudKitSchemaWithOptions` method. Take a look at the API diffs here: http://codeworkshop.net/objc-diff/sdkdiffs/ios/13.0b4/CoreData.html
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Update: Filed a feedback report since this seems to be an issue others are encountering as well. (See https://www.andrewcbancroft.com/blog/ios-development/data-persistence/nspersistentcloudkitcontainer-buggy-behavior-list/)
I was able to get it to work on an actual device running iOS 12, but not in the Simulator.
