Circling back on the LocalLM Lab arc. With v0.7, we've moved from prompt experimentation into real app development on Apple's Foundation Models local AI. The LocalLM Lab SDK lets you build that same on-device model and MCP client this thread has covered directly into your own app, with real tool and data access (Slack, Todoist, GitHub, Notion, Linear, plus Calendar, Reminders, Contacts and Location). And you can ship your app including through the Mac App Store. This is a big improvement over version 0.6, where the localai-cli toolkit needed LocalLM Lab installed and running. On the other hand, the SDK (LocalLMLabSDKCore) doesn't relay through anything; it links FoundationModels and a real MCP client directly into your own binary and is totally self-contained. The example included in the SDK, Plate Today, has actually been built into a sandboxed test app and verified working, with a signed path to a Mac App Store .pkg (Apple Distribution signing + provisioning profile pipeline). That's "verified signable and sandbox-compatible," to be precise. Entitlements (from personal experience: always a complicated topic): com.apple.security.app-sandbox + com.apple.security.network.client for the app itself, plus the standard personal-information entitlements per connector used (com.apple.security.personal-information.calendars, .addressbook, .location) and matching NS*UsageDescription strings in Info.plist. The one worth flagging specifically: the network entitlement is easy to miss and fails silently rather than throwing. Without it, MCP connections and Weather calls just hang with no error surfaced. OAuth handling requires the app delegate callback (application(_:open:)), not SwiftUI's .onOpenURL. Worth knowing before wiring it up if you're SwiftUI-only. Full entitlements list + SDK guide: https://github.com/ancientcomputing/locallm/blob/main/docs/sdk-guide.md Feature page: thisbrain.ai/locallm/sdk.html I hope the availability of the SDK (free, Apache 2.0 license) will give folks further incentive to explore local AI-enabled applications on the Mac. What else would you want to do that the SDK doesn't currently support? File picker? Calendar/Reminders/Contacts edits & writes?

I am developing a LINE-based service for users in Japan. With each user's explicit consent, our backend would read their selected iCloud calendars and send event reminders through LINE. Users would not be required to install a native iOS or macOS app. Apple's support article describes Apple Account authorization for supported third-party apps: https://support.apple.com/en-us/121539 Is this authorization available to a web service with this architecture? What are the eligibility requirements, application process, and Calendar integration documentation? If it is not available, does Apple officially support server-side CalDAV access using a user-generated app-specific password for this use case? What requirements and limitations apply to credential handling, access scope, and synchronization frequency? Do the requirements differ between reading calendars and potentially creating or updating events in the future? If this architecture is not supported, is there another documented integration path? I would appreciate links to the relevant documentation or the appropriate technical contact.

Apple Support article 121539 describes Apple Account authorization for supported third-party apps that access iCloud Mail, Calendar, and Contacts: https://support.apple.com/121539 An Apple DTS engineer directed developers to the “Express interest in Auth 2.0 for iCloud Mail, Calendar, and Contacts” form: https://developer.apple.com/forums/thread/825772 I develop Zefir Calendar, an independent Windows desktop app built with Electron. It currently accesses remote iCloud calendars through CalDAV with the user's Apple Account email address and an app-specific password. It supports personal and shared calendars and event reading, creation, editing, and deletion according to the user's permissions. We want to request Calendar access only. A related discussion says the interest form requires an App Store URL: https://developer.apple.com/forums/thread/847329. A Windows-only app has no Apple App Store URL. Could an Apple engineer clarify: Can an independent Windows app use this authorization flow? If so, how should a Windows-only developer submit the interest form without an Apple App Store URL? Is paid Apple Developer Program membership or separate approval required? What registration, service, capability, or entitlement is required? Is there technical documentation for the flow and its Calendar scopes? Can authorization be limited to Calendar, and does it support read/write access to personal and shared iCloud calendars? Are the granted credentials used with the existing iCloud CalDAV service, or with a different API? What are the supported token refresh, revocation, and desktop callback mechanisms? This question concerns authorization for remote iCloud Calendar data, not Sign in with Apple for identity or EventKit access to local device calendars. Our goal is to replace app-specific passwords while preserving our CalDAV functionality if Apple supports it.

Hi, In the calendar app I created an event called E1 on an iCloud calendar and noticed 2 entries, so I suspect EKEventStore.events(matching:) returned it. Note: I am not referring to recurring events. Used an iCloud calendar Question Is it possible EKEventStore.events(matching:) to return duplicate events? When I did search the following was reported by AI, but I am not very sure, so hence the question. The EKEventStore.events(matching:) method returning duplicate events is a well-known, expected behavior in EventKit. It typically happens because a single event exists across multiple calendars, has multiple participants/invitees, or EventKit is fetching the event from different sync sources (like iCloud and a local cache) simultaneously.

Hello! Thanks for helping. This is driving me crazy. Since ios 16 Calendar App is getting notifications from shared calendar in the "inbox" bottom right like crazy. These invite are not related to my personnal calendar. How do I stop these ?? thanks in advance guys I have looked everywhere.

Overview I would like to observe calendar changes using NotificationCenter.messages(of: for:) I want receive Sendable messages, not traditional Notification which is not Sendable Problem I can't seem to get the following code to compile import EventKit NotificationCenter.default.messages( of: EKEventStore.EventStoreChanged.Subject.self, for: .changed ) Reference https://developer.apple.com/documentation/foundation/notificationcenter/messageidentifier/changed-50yz5 Questions How can I use by using NotificationCenter.messages(of: for:) for Calendar changes?

UIKit app can not edit an event using EKEventEditViewController in iOS 27 Betas. The Done tick button at the top does not work after editing an event. Also does not work if EKEventViewController is first used to display the event. Then the "Edit" tapped to display the EKEventEditViewController. Anyone else seeing this?

I am not sure if this is an iOS 27 beta bug or if I should be able to see the accept/deny/'maybe' UI when using the EKEventViewController in my app.

I've looked around quite a bit at the EventKit documentation and done all the searching I could think of, as well as examining the EKCalendar and EKEventStore types. Trying to find out how to view, modify, and create groups of reminders lists.

I'm building an app that integrates with Reminders using EventKit, but I can't find a way to access two important structures from EventKit: The groups that contain reminder lists The sections inside each reminder list (available since iOS 17) Any help or guidance would be appreciated.

I'm building an app that heavily relies on EKEventStore for calendar and reminder integration. The API is simple - and limited. Change notifications amount to "something changed, you'd better refetch everything you care about." There's no way to know whether the calendar was updated while your app was closed or backgrounded. EKEvents and EKReminders don't trigger SwiftUI view updates, so you end up shunting them into your own observable state and keeping the two in sync. My app is fairly complex rendering-wise, and I lament being locked into treating EKEventStore as a first-class citizen of my view and data layer. It makes everything clunkier, essentially shuts the door on modern features like undo/redo, and makes integrating with other calendar providers that much harder. I'm exploring a custom SwiftData DataStore ↔ EKEventStore sync engine, but this is no easy task. There are still many unknowns I'd need to spike out before I can even attempt a proper implementation. Still, I'm curious - is this something being actively worked on behind the scenes? Will we see a more modern, observable, SwiftUI-native EventKit integration in the future?

Is there a way to create a grocery list in swift programmatically? With color and icon? I mean the new Reminders.app v7.0 features. I don't find code or guide in the dev documentation.

I'm developing an IOS time management app, and want to sync data from ios local calendar. How to incrementally synchronize data after full synchronization?

2nd time this happened within weeks. Caution to all developers. Used to be reliable. Don't rely on it any more.

Hi everyone, I'm building a task management app that layers on top of EventKit/Reminders. I'm also moderating /r/AppleReminders. I see a confusion around the semantics of dates on both the developer side and on the user side. I'm trying to map the standard productivity mental model to the EKReminder implementation and hitting some walls. In productivity contexts, a task tends to have three distinct dates: Start Date: When the task becomes actionable — Don’t alert the user before this date. Notification: When the device should buzz/ping the user — Meaning that they can get started on the task. Due Date: Hard deadline — If the system works well, tasks are meant to rarely be past-deadline; productivity systems are about meeting deadlines rather than about missing them. The EventKit Reality Here is what I’m seeing in practice, and I’m hoping someone can correct me if I’m wrong: Field Description In Practice (Reminders App) startDateComponents Docs say "start date of the task" Seemingly unused? I can set it via API, but the Reminders app UI ignores it. It doesn't seem to trigger visibility in "Today" or Smart Lists. dueDateComponents Docs say "date by which reminder should be completed" Conflated. Acts as the "Date" you see in the list. It functions as the Start Date (shows in Today), Due Date (turns red tomorrow), AND Notification time (unless early alerts are set). alarms Inherited from EKCalendarItem seems to be used for the actual notifications, including "Early Reminders," but tightly coupled to the due date in the UI. My Questions: Is startDateComponents effectively a dead field? Is there any native behavior (Smart List filtering, sorting, visibility) that respects this field, or is it purely for metadata storage for third-party apps? Smart List Logic: I was hoping to create a Smart List that shows "Actionable" items (i.e., Start Date <= Today). However, the Smart List filters only offer a generic "Date" field, which maps to dueDateComponents. Has anyone successfully filtered by startDateComponents in a native Smart List? Conflation: Is there any "blessed" way to set a Due Date that is distinct from the Notification time without fighting the system? (e.g. Due Friday, but remind me Wednesday). Any insight into the intended semantics here would be huge. I'm trying to avoid fighting the framework, but the "One Date to Rule Them All" approach in the Reminders app is making it tricky to support separate Start/Due dates. Thanks!

Hello, Regarding EKEventStore, the WWDC session mentions that “you should only have one of these for your application.” In my app, I need to use the instance on both the main thread and a background thread, and I would like to share a single instance across them. However, EKEventStore is a non-sendable type, so it cannot be shared across different isolation domains. I would like to know what the recommended best practice is for this situation. Also, do I need to protect the instance from data races by using a lock? Thank you.

I would like the function in the calendar app to be able to assign a status to the set appointment, such as unconfirmed or pending.

Hello,I try to get all contacts from an iCoud Account...First I run:&lt; ?xml version="1.0" encoding="UTF-8" ?&gt; &lt; d:propfind xmlns:d="DAV: "&gt; &lt; d:prop &gt; &lt; d:current-user-principal/ &gt; &lt; /d:prop &gt; &lt; /d:propfind &gt;Then I get /xxxxxxxxxxx/carddavhome/ and run:&lt; ?xml version="1.0" encoding="UTF-8"? &gt; &lt; d:propfind xmlns:d="DAV:" xmlns:card="urn:ietf:params:xml:ns:carddav" &gt; &lt; d:prop &gt; &lt; card:addressbook-home-set/ &gt; &lt; /d:prop &gt; &lt; /d:propfind &gt;This give me the URL https://pXX-contacts.icloud.com:443/xxxxxxxxxxx/carddavhome/ then I send the following request to this URL:&lt; ?xml version="1.0" encoding="UTF-8"? &gt; &lt; d:propfind xmlns:d="DAV:" xmlns:card="urn:ietf:params:xml:ns:carddav" &gt; &lt; d:prop &gt; &lt; d:displayname/ &gt; &lt; d:resourcetype/ &gt; &lt; /d:prop &gt; &lt; /d:propfind &gt;And I get:&lt; ?xml version="1.0" encoding="UTF-8"? &gt; &lt; multistatus xmlns="DAV:" &gt; &lt; response &gt; &lt; href &gt;/xxxxxxxxxxx/carddavhome/&lt; /href &gt; &lt; propstat &gt; &lt; prop &gt; &lt; resourcetype &gt; &lt; collection/ &gt; &lt; /resourcetype &gt; &lt; /prop &gt; &lt; status &gt;HTTP/1.1 200 OK&lt; /status &gt; &lt; /propstat &gt; &lt; propstat &gt; &lt; prop &gt; &lt; displayname/ &gt; &lt; /prop &gt; &lt; status &gt;HTTP/1.1 404 Not Found&lt; /status &gt; &lt; /propstat &gt; &lt; /response &gt; &lt; /multistatus &gt;If I try to run this to the the URL https://pXX-contacts.icloud.com:443/xxxxxxxxxxx/carddavhome/contacts&lt; ?xml version="1.0" encoding="UTF-8"? &gt; &lt; card:addressbook-query xmlns:d="DAV:" xmlns:card="urn:ietf:params:xml:ns:carddav" &gt; &lt; d:prop &gt; &lt; d:getetag/ &gt; &lt; card:address-data/ &gt; &lt; /d:prop &gt; &lt; /card:addressbook-query &gt;I get: Improperly formed XML encountered, unexpected root nodeWhat is my mistake? The first 2 queries work and give me the expected results, the 3rd one should give me a list of the addressbooks and groups and the 4th one should give me all VCards.

EKEventStore on Apple Watch is not giving me all calendars. I can see only calendars of the source 'Subscriptions', but non of the calendars of source CalDAV (iCloud). This problem exists over multiple apps. Code works fine on iPhone. Any ideas? Minimal example code: import SwiftUI import EventKit struct ContentView: View { let eventStore = EKEventStore() @State var success: Bool = false @State var calendarNames: [String] = [String]() func request() async { success = (try? await eventStore.requestFullAccessToEvents()) ?? false } func list() { calendarNames = eventStore.calendars(for: .event).map { $0.title } } var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Access: \(success.description)") ScrollView { ForEach(calendarNames, id: \.self) { name in Text(name) } } } .onAppear { Task { await request() list() } } .padding() } }

Our app provides a calendar that integrates with the default calendar app. Specifically, we use iOS EventKit to perform CRUD operations on calendar data. Recently, we have received reports from users that all of their events have disappeared. However, after reviewing our implementation and logs, we have not been able to identify the cause. Some users have also reported that all data in their default calendar app has disappeared as well. Does anyone have any idea what might be causing this? To delete an event within our app, users must press the delete button and then confirm the deletion in a dialog. Additionally, it is not possible to delete more than two events at once. We've seen many people in the community discussing a bug where calendar events disappear after updating to iOS 18. If you have any information about when or why this happens, we'd appreciate it if you could share your insights.