Hello, I am developing a cross-platform mobile app that communicates with an external accessory over a serial (UART) link. HARDWARE : The accessory is an optical reading probe that connects to the phone via USB. Inside the cable there is a standard FTDI USB-to-serial chip (similar to common FTDI/CP210x USB-serial adapters). WHAT WORKS On Android, our app: Detects the USB device Opens the serial port Reads and writes raw bytes successfully This wired FTDI path is fully implemented and working. WHAT DOES NOT WORK On iPhone, using the same wired FTDI USB accessory: We connect via Lightning or USB-C adapter The app never sees the FTDI device We cannot find a public iOS API to open a generic USB-serial port MY QUESTION : Is there any supported way for a third-party iOS app to communicate with a generic FTDI USB-serial device over a wired USB connection? Specifically, am I missing: A public Apple framework for USB serial? An Info.plist key or entitlement? A system driver on iOS similar to macOS AppleUSBFTDI (TN2315)? Or is wired USB-serial on iPhone only possible with MFi-certified accessories (External Accessory framework) or another transport such as Bluetooth LE? WHAT I HAVE ALREADY CHECKED External Accessory: seems to require MFi hardware and a registered protocol string. Our FTDI probe is not MFi. TN2315 (AppleUSBFTDI): appears to be macOS only, not iOS. Physical USB connection: cable fits, but no serial API is exposed to the app. ENVIRONMENT Platform: iOS (iPhone) Language: C# / .NET-iOS Need: transparent byte-level serial read/write SUMMARY: Android USB-serial works with our FTDI wired accessory. iOS does not. Am I missing something on iOS, or is generic FTDI USB-serial simply not supported for third-party iPhone apps? Thank you for any guidance.

Hi I was wondering under what circumstances does @Query call body. Does it call it when the result set changes? E.g. object added/removed/moved. Does it also call when the result set is the same but a property of a model changed? I'd prefer 1, since models are @Observable my Views can handle tracking if they need to update when a property of a model changes. But I am concerned it is 2 which would cause unnecessary calls to body? E.g. a ForEach would needlessly be reinit since the model array is exactly the same. So which is it? By the way it would be useful if the docs could be updated with this important info. Thanks

This is a StoreKit / ExternalPurchaseCustomLink clarification. Apple DTS asked me to post the follow-up question here. We are designing an SDK for apps that support EU external purchase. In EU storefronts, the app will use ExternalPurchaseCustomLink only: No App Store In-App Purchase will be offered to users. No Product.purchase() will be called. No SKPaymentQueue.add(_:) will be called. The actual purchase will happen only on our external website through the ExternalPurchaseCustomLink flow. Question: In this EU ExternalPurchaseCustomLink-only setup, is it acceptable and supported to call Product.products(for:) / SKProductsRequest only to fetch product display metadata from App Store Connect? The metadata would only be used to display the product list UI, for example: product title / display name localized price currency / priceLocale formatting information The returned Product / SKProduct would not be used to start an App Store purchase. Or should apps avoid Product.products(for:) / SKProductsRequest entirely in EU storefronts where only ExternalPurchaseCustomLink is offered, and use their own product catalog instead?

We operate a captive portal WIFI network in a walled-garden setup. There is no public internet access on this network. Users connect to our SSID and can only reach a local resource. On Android, our captive portal can show a button that launches the devices default browser and navigates to our portal page. We cannot reproduce this on iOS: we can place the button inside the CNA tear sheet but tapping it does not open Safari, the redirect simply does not happen. I found this older thread describing the same need: https://developer.apple.com/forums/thread/75498 From that thread, it seems the behavior changed several times. It reportedly worked around iOS 11.2 then broke again in later releases. My questions: On current iOS, is it possible to open Safarı or the default browser programmatically from within the CNA? For example, via a link or button after authentication? If yes, what is the supported way? If it is not supported, is that intentional? Is there any official documentation describing CNA limitations and the recommended pattern? For a walled-garden network with no public Internet, what is Apple's recommended approach to move the user from the CNA into a full browser session?

There’s hundreds of forms of people wanting and waiting for swifitdata support for CloudKit public or shared databases. Is this ever going to come or should I just give up and use my own database dont really want to learn core data for such a small part of my app

I made an apple script to move images into folders based on it's Year and Month. I use it to archive raw images when I'm done with it. Though it could help others out there. Using the "Folder Actions Setup". It will get the year and month of the file. Create a folder and set the filename to its year, then create another folder in the year folder and set the filename to it's month and move the file into it. property month_index : {"01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"} on adding folder items to this_folder after receiving these_items #set this_year to the year of (current date) try tell application "Finder" repeat with i from 1 to number of items in these_items set this_item to item i of these_items as alias set item_type to the kind of this_item as string if item_type is not "Folder" then set file_date to the creation date of this_item set file_year to the year of file_date as string set j to the month of file_date as integer set file_month to item j of month_index as string set Done to my move_file(this_folder, file_year, file_month, this_item) else if item_type is "Folder" then exit repeat end if end repeat end tell on error error_message number error_number if error_number is not -128 then display dialog error_message & error_number buttons {"Cancel"} default button 1 giving up after 120 end if end try end adding folder items to on move_file(main_folder, year_foldername, month_foldername, this_item) try tell application "Finder" set year_folder to my create_folder(main_folder, year_foldername) set month_folder to my create_folder(year_folder, month_foldername) move this_item to the month_folder without replacing end tell on error error_message number error_number if error_number is -15267 then rename_file(month_folder, this_item) else if error_number is not -128 then display dialog error_message & " move file " & error_number buttons {"Cancel"} default button 1 giving up after 120 end if end try end move_file on create_folder(directory, foldername) try tell application "Finder" if not (exists folder foldername of directory) then make new folder of directory with properties {name:foldername} end if set the sub_folder to (folder foldername of directory) as alias return sub_folder end tell on error error_message number error_number if error_number is not -128 then display dialog error_message & " create_folder " & error_number buttons {"Cancel"} default button 1 giving up after 120 end if end try end create_folder on rename_file(sub_folder, this_item) try tell application "Finder" set increment to 1 set file_name to the name of this_item set file_extension to the name extension of this_item set old_file to the (file (name of this_item) of folder sub_folder) as alias repeat set trimmed_name to text 1 thru -((length of file_extension) + 2) of the file_name set new_name to (the trimmed_name & " " & (increment as string) & "." & file_extension) as string if not (exists document file new_name of the sub_folder) then set name of (document file file_name of sub_folder) to the new_name move document file this_item to the sub_folder exit repeat else set the increment to the increment + 1 end if end repeat end tell on error error_message number error_number if error_number is not -128 then display dialog error_message & " archive_file " & error_number buttons {"Cancel"} default button 1 giving up after 120 end if end try end rename_file

I recently updated my iPhone SE (2020) to the iOS 27 beta, and initially the experience was excellent. The phone felt noticeably faster and more responsive, and I was genuinely impressed with the update. However, after about a day of usage, I started experiencing a charging-related issue. One night, I left my phone connected to the charger before going to sleep when the battery was at 55%. The next morning, I found that the battery had dropped to 42% instead of charging. I checked all connections and confirmed that the charger, cable, and power source were properly connected. When I disconnected and reconnected the charger, the charging lightning bolt icon would briefly appear, then turn grey after about two seconds, and finally disappear completely a couple of seconds later. The phone would not charge. Assuming it might be a faulty charger or cable, I tested with: A different Apple charger A different Lightning cable The same issue persisted. Next, I connected the phone to my Mac. Surprisingly, it started charging, and Finder recognized the device normally. Over the next few days, the behavior became inconsistent: Sometimes the phone would charge. Sometimes it would not charge at all. Connecting to the Mac worked most of the time, but occasionally even that failed. I also noticed another unusual behavior: If I unplugged the Lightning cable from the iPhone and plugged it back in, the charging symbol would briefly appear. However, if I left the cable connected to the iPhone and unplugged/replugged only the USB end from the power adapter, there would be no response whatsoever—no charging sound, no charging icon, nothing. I cleaned the charging port, cable connectors, and charger contacts, but the issue remained. At that point, I realized the problem started immediately after installing the iOS 27 beta. To verify whether it was software-related, I restored the device back to iOS 26.5. After downgrading, the charging issue completely disappeared, and the phone began charging normally again with the same charger and cable. Based on my testing, this appears to be a software-related issue introduced in the iOS 27 beta rather than a hardware problem. I am posting this in case other iPhone SE (2020) users are experiencing similar charging behavior after updating to the beta. Device: iPhone SE (2020) Issue: Intermittent charging failure after updating to iOS 27 beta Status: Resolved after restoring to iOS 26.5

I'm building a cross-device parental-control app: separate child and parent devices in the same Family Sharing group. I want to show the child's per-app (and per-category) Screen Time usage on the parent device. After extensive testing I can only get the child's total minutes across, and I'd like to confirm the supported architecture before building further on a path the framework may intentionally forbid. Authorization / setup Child device: AuthorizationCenter.shared.requestAuthorization(for: .child) — approved. Confirmed authorized: my app appears under Settings → Screen Time on the child, and the child's own DeviceActivityReport(users: .all) renders full per-app data. Parent device: separate device in the same family. Targets: main app + DeviceActivityReport extension + DeviceActivityMonitor extension, all with com.apple.developer.family-controls and a shared App Group. Physical devices, iOS 26.4.1. Xcode ⟦version⟧. What works: only the child's total minutes reach the parent — and only via my own relay: a DeviceActivityMonitor extension on the child writes aggregate totals to the App Group, the host app syncs them through CloudKit. No Screen Time API itself delivers the child's app/category breakdown to the parent. ⸻ Finding 1 — the report extension computes correct per-app data but cannot export it. On the child, makeConfiguration(representing:) iterates the results and produces correct per-app durations: LumicoActivityReport makeConfiguration done — 1 activityData, 1 segments, 5 apps, 17 min total Writing those aggregates to the shared App Group from inside the extension is then denied by the sandbox: Couldn't write values for keys ("screen_time_per_app_json") in CFPrefsPlistSource (Domain: group.servusjon.Lumico.shared …): setting preferences outside an application's container requires user-preference-write or file-write-data sandbox access (UserDefaults.set doesn't throw — the write silently no-ops; only this CFPrefs log reveals the denial.) Q1: Is there any supported way to surface aggregated, non-identifying per-app usage (app name + minutes + category) computed inside the DeviceActivityReport extension to the host app, given that App Group writes from the extension are denied? Or is the DeviceActivityMonitor extension (threshold events) the only supported way to get any usage signal out of the Screen Time sandbox? Finding 2 — on the parent, users: .children shows the parent's OWN data. On the parent I embed DeviceActivityReport(_:filter:) with DeviceActivityFilter(users: .children, …). The report renders, but shows the parent's own apps/categories — no child data. FamilyActivityPicker on the parent behaves the same (lists the parent's own apps). The identical code on the child (users: .all) returns the child's full data — so the pipeline works; only the cross-device delivery to the parent fails. Q2: What is required for DeviceActivityReport(users: .children) to deliver a child's activity to a third-party app on the parent device? Must the parent app hold a specific FamilyControls authorization (which FamilyControlsMember)? What conditions make FamilyActivityPicker surface a child's apps (not just categories) from the family on the parent device — authorization type, Family Sharing roles, child managed status, sync timing? ⸻ Already ruled out: physical devices (not Simulator); Screen Time data present on the child; extension correctly embedded (ExtensionKit com.apple.deviceactivityui.report-extension) and running makeConfiguration normally; family-controls + App Group present on app and both extensions; iCloud container named conventionally iCloud.. Core question: What is the supported architecture for showing a child's per-app usage on a parent's device in a third-party app? I want to build on the sanctioned path rather than a workaround. Thanks!

Hi, I wanted to develop a small tool to launch Home Assistant OS in a Virtualization.framework VM. Something lean (no UI, no daemons), zero-config, and Apple Silicon only. I got that running, but I wanted to also use bridge networking and USB device pass-through which require the com.apple.vm.networking and com.apple.developer.accessory-access.usb entitlements, respectively. I was unable to use those for local development using ad-hoc signing, so I guess it requires a paid Apple Developer account and official approval so that they can be enabled in provisioning profiles. I'm open to reactivating my developer subscription which I let expire years ago, but wanted to first assess the chances of getting approval (no point in renewing the subscription if I won't get the permission in the end). I could make this an open source project, if it helps.

Incoming calls reported via reportNewIncomingCall on a CXProvider are correctly presented on the iPhone via CallKit, but are never relayed to the paired Apple Watch. Native cellular calls relay to the Watch correctly on the same devices. What does a VoIP app's CXProvider need to satisfy for callservicesd to consider it eligible for phone continuity relay to paired Apple Watch?

I have the following code - you can see where I had to comment out the code on the simulator. Is this expected? The code works perfectly fine on a physical iPad device. Is it documented somewhere that NSFileVersion doesn't work with non-local versions in the simulator? func loadPreviewDirectly( from version: NSFileVersion, completion: @escaping (CIImage?) -> Void ) { let versionURL = version.url let access = versionURL.startAccessingSecurityScopedResource() defer { if access { versionURL.stopAccessingSecurityScopedResource() } } print("Loading version: \(version.persistentIdentifier) | Local: \(version.hasLocalContents)") // 1. SIMULATOR CATCH: If running in simulator and the file is missing, it will never download. #if targetEnvironment(simulator) if !version.hasLocalContents { print("⚠️ iOS Simulator cannot materialize remote NSFileVersions. Fallback triggered.") // You cannot test remote versions here. For testing on the simulator, // test with a version where version.hasLocalContents == true (created locally in this session). DispatchQueue.main.async { completion(nil) } return } #endif let coordinator = NSFileCoordinator() var coordinationError: NSError? // 2. Wrap everything in a sequential reading coordination coordinator.coordinate(readingItemAt: versionURL, options: [], error: &coordinationError) { readURL in let image = CIImage(contentsOf: readURL) DispatchQueue.main.async { completion(image) } } if let error = coordinationError { DispatchQueue.main.async { self.errorMessage = error.localizedDescription completion(nil) } } }

We have an app that uses UDP messaging. It has been working for over 3 years successfully. The App is now failing on installation with MacOS26. The issue would appear to be that MacOS is silently blocking the UDP traffic. If we disable the local network for the App, and then turn back on, this will fix the issue. But this needs to be done on every system restart.

We have six Advanced App Clip Experiences configured for our production app, each mapped to a different path under a single domain, each with its own title and image. When a user without the full app installed receives one of these links in Messages, iOS always presents the default App Clip card -- never the matching advanced experience card. The same URLs resolve the correct advanced card in Safari. What we've already verified (so this isn't a basic setup problem): Opening the exact same URL in Safari shows the correct advanced card, including the expected per-path title. A Local Experience (Settings → Developer → App Clips Testing) for the same path + bundle ID validates and launches the correct flow. Associated Domains validation is green in Settings. The AASA at app-site-association.cdn-apple.com contains the appclips component with our App Clip bundle ID, and the applinks components include all six paths. In App Store Connect, all six Advanced App Clip Experiences show "Received" with successful domain validation, and the app + App Clip are live in the App Store. Reproduced on multiple devices on iOS [version], none with the full app installed. Messages does show a card — it's just always the default card. Our questions: Is per-path Advanced App Clip Experience card selection supported in the Messages link bubble at all -- or is Messages documented to always present the default experience metadata regardless of which advanced-experience URL is shared? Apple's App Store Connect help states the default metadata is used "in the app clip link bubble in Messages," which suggests this may be by design -- can someone confirm? If advanced cards in Messages are supported, what conditions cause Messages (but not Safari) to fall back to the default card for the same URL? Does "Received" status indicate an advanced experience is fully live, or is there a later state that confirms Messages rollout? If Messages is expected to always show the default card, we'll plan around that -- we just want a definitive answer rather than continuing to chase a configuration cause. Thanks!

I have a widget that uses a WidgetConfigurationIntent where a user can pick what to display in the widget. This configurable widget works fine in iOS 26, but if the app is built with the iOS 27 SDK / Xcode 27, it no longer will respond to any changes from the parameter, and the default is always shown. Is this behavior a bug, or have there been underlying changes in this area that need new accommodations? Thanks!

Dear Apple Developer Support Team, We are experiencing a crash in our iOS application that appears to originate within Apple's MapKit/VectorKit framework. Based on the crash logs, the failure occurs during map rendering operations inside VectorKit. The crash stack contains only Apple framework calls and does not include any application business logic methods. Crash Summary: Exception Type: NSMallocException Framework: MapKit / VectorKit Crash Location: VectorKit map rendering pipeline Observed Behavior: Application crashes while rendering map-related data Our analysis indicates that the crash occurs within Apple's native map rendering engine. Since the stack trace does not contain any application-specific code, we are unable to determine whether the issue is caused by framework behavior, an OS/device-specific condition, or a framework-level defect. We would appreciate your assistance in reviewing this issue and advising whether there are any known MapKit/VectorKit issues related to this crash signature. We can provide additional crash logs, device details, and reproduction information if required. Thank you for your support. Kind Regards, Yogesh Raj Ushyaku Software Solutions LLP

Hi Apple Developer Support / WeatherKit team, I’m seeing WeatherKit fail on a physical iPhone with what appears to be a JWT / permission issue, even though the app appears to be correctly configured and signed with the WeatherKit entitlement. App / project context: App name: Signals Platform: iOS Framework: SwiftUI WeatherKit usage: Native WeatherKit framework, using WeatherService.shared.weather(for:) Purpose: Showing a small morning weather summary inside the app What I have already verified: Active Apple Developer Program membership WeatherKit capability enabled for the App ID in Apple Developer Portal WeatherKit capability enabled in the App Capabilities tab WeatherKit capability added in Xcode Signing & Capabilities Automatic signing enabled Built and tested on a physical iPhone device Location permission is requested and granted The app binary appears to include the WeatherKit entitlement The embedded provisioning profile appears to include the WeatherKit entitlement Issue: WeatherKit still fails at runtime with a JWT / permission-related error. Could you please help verify whether: The WeatherKit entitlement is correctly attached to my App ID and provisioning profile My Team ID / App ID has WeatherKit access fully enabled on Apple’s backend There are any backend propagation delays or stuck entitlement states WeatherDaemon has permission to generate JWTs for this app There is anything else I need to reset or regenerate, such as provisioning profiles, certificates, or App ID capabilities I can provide: Team ID Bundle ID provisioning profile UUID entitlement output from codesign device logs / WeatherKit error logs screenshots of App ID capability settings Thank you.

I have a weird situation arising in my app where calling BGTaskScheduler.shared.submit(request) seems to fail silently, without raising any of the BGTaskScheduler.Error's. Here's what's happening. A user registers and submits 5 BGContinuedProcessingTask's, with different ID's using the wildcard. When trying to submit the 6th task like this: try bgTask.submit() //submit task isCreatingBGTask = false // toggle ProgressView off dismiss() //Dismiss the sheet The sheet will dismiss, but the device never gives the haptic feedback, and the task is not visible in the notification centre. Having a maximum number of running tasks makes sense, but why isn't it raising the error BGTaskScheduler.Error(.immediateRunIneligible). It also doesn't seem like there's a way to query the tasks that are in progress (at least I couldn't find a way). So for now I'll just track my own tasks manually, and prevent submission at 5 tasks, but I'm wondering what would happen if another app had 2 tasks going, and then my user tries to submit 3 or something like that.

WeatherService fails on every request with: WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors Code=2 "(null)" hourly forecast fetch failed: … Code=2 I've verified the entire setup and the error persists, which points to the App ID's WeatherKit token generation not being provisioned on Apple's backend: Team ID: 2LWCLD2636 Bundle ID: com.hoagiecorps.poppit WeatherKit capability and App Service both enabled on the App ID. com.apple.developer.weatherkit entitlement present in the signed binary and the embedded provisioning profile (verified via codesign -d --entitlements). A TestFlight build carrying the entitlement has been processed (VALID). Location authorized (When-In-Use); valid coordinates are obtained — the failure is purely the JWT auth step. Tried: device reboot, VPN off, iCloud Private Relay off, cycling the WeatherKit capability off/on plus regenerating the profile and clean rebuild, and waiting several days. Physical device, iOS 26. Could someone from the WeatherKit team please check the status for Team 2LWCLD2636, Bundle ID com.hoagiecorps.poppit, and enable WeatherKit token generation for this App ID? It looks like a backend entitlement sync is needed. Thanks!

I have a SwiftData + CloudKit app that is deployed to the Mac App Store. As a diagram my situation looks like: On my Mac, I have installed the App Store version of the App. When developing it I run the app via Xcode, so I can have a debug build running. The initial stable schema was deployed to CloudKit production before the App release. Now, when I change the SwiftData schema again and run the Debug app on my Mac What happens is that: The SwiftData local store is on the latest schema The CloudKit schema for development is automatically updated That’s all good, but if I run the App Store app version of my app. By default, it uses the same SwiftData store for both builds of the app, which are being synced to different CloudKit schemas for development and production at the same time. As a result, I get an unreliable state where I have seen data duplication as a result, or CloudKit syncing just breaks. Also, since I’m developing the app, the changes to the schema in development may not make it to production, so I don’t want to promote those changes to production. So my question: What’s the recommended way to evolve the schema for an app already on the App Store? I haven’t seen any example or session from Apple that tackles this -what I consider common- use case. I tried to have different CloudKit containers for a "Dev" and "Prod" builds, but that wasn’t the solution.

Hello, With Core Data, we can use the isConfiguration(withName:compatibleWithStoreMetadata:) method on an NSManagedObjectModel alongside metadata(for:) on NSPersistentStoreCoordinator to check if the on-disk store is up to date or not. Is this the way to do it too with SwiftData or do we have an easier way to check if the on-disk store will need to migrate? I want to inform my users in the UI when the app launches (or from widgets or app intents). Regards, Axel