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For anyone else finding this:You need to call container.initializeCloudKitSchema() after container.loadPersistentStores.You don't really need to call container.initializeCloudKitSchema() at all, as CloudKit will create your schema on the fly. initializeCloudKitSchema just sends some fake data for your model, so it's handy to see if anything's going to break that Xcode didn't warn you about.Here's some code that works in Xcode 11 beta 5 to initialize an NSPersistentCloudKitContainer using a local store and a cloud store (see the Manage Multiple Stores section of the Setting Up Core Data doc). // MARK: - Core Data stack /// Convenience method so you can do DataManager.shared.context instead of DataManager.shared.persistentContainer.viewContext. lazy var context = self.persistentContainer.viewContext /// persistentContainer.viewContext lazy var persistentContainer: NSPersistentContainer = { /* The persistent container for the application. This implementation creates and returns a container, having loaded the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail. */ let container = NSPersistentCloudKitContainer(name: "Model") // Put our stores into Application Support var storePath: URL do { storePath = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true) } catch { fatalError("Unable to get path to Application Support directory") } // Create a store description for a local store let localStoreLocation = storePath.appendingPathComponent("local.store") let localStoreDescription = NSPersistentStoreDescription(url: localStoreLocation) localStoreDescription.configuration = "Local" // Create a store descpription for a CloudKit-backed local store let cloudStoreLocation = storePath.appendingPathComponent("cloud.store") let cloudStoreDescription = NSPersistentStoreDescription(url: cloudStoreLocation) cloudStoreDescription.configuration = "Cloud" // Set the container options on the cloud store cloudStoreDescription.cloudKitContainerOptions = NSPersistentCloudKitContainerOptions( containerIdentifier: "iCloud.com.mydomain.mycontainer") // Update the container's list of store descriptions container.persistentStoreDescriptions = [ cloudStoreDescription, localStoreDescription ] container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. // You should not use this function in a shipping application, although it may be useful during // development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device * is locked. * The device is out of space. * The store could not be migrated to the current model version. Check the error message to determine what the actual problem was. */ fatalError("Unresolved error \(error), \(error.userInfo) for \(storeDescription)") } }) do { // Uncomment to do a dry run and print the CK records it'll make // try container.initializeCloudKitSchema(options: [.dryRun, .printSchema]) // Uncomment to initialize your schema try container.initializeCloudKitSchema() } catch { print("Unable to initialize CloudKit schema: \(error.localizedDescription)") } return container }()