Hello everyone, We are encountering a critical regression introduced in iOS 26.4 that results in permanent workout data loss for users. When invoking HKWorkoutBuilder.finishWorkout(completion:) while the iOS device is locked, the save operation fails completely. However, it fails silently: the completion handler executes but returns both a nil workout and a nil error. Expected Behavior: Before iOS 26.4 finishWorkout resulted in a workout id, and correctly stored the workout data in HealthKit. According to HealthKit data protection documentation, saving data when the device is locked should either succeed (writing to a temporary journal file to be merged upon unlock) or explicitly throw an error such as HKError.Code.errorDatabaseInaccessible. Actual Behavior: Because the framework returns nil for both the object and the error, the application has no way to detect that the save failed. We cannot implement a retry mechanism or queue the save, resulting in silent data loss. Steps to Reproduce: We have built a Minimal Reproducible Example (MRE) that reliably triggers this: Initialize an HKWorkoutBuilder and call beginCollection(withStart:) followed by endCollection(withEnd:). Wrap the finishWorkout call in a short 5-second asynchronous delay, protected by a UIBackgroundTask to prevent app suspension. Lock the physical device during this 5-second window. The finishWorkout completion handler will execute while the device is locked, returning workout == nil and error == nil. Existing Reports: We have filed this via Feedback Assistant (a month ago) and opened a TSI (a week ago), providing the MRE project and a sysdiagnose captured at the time of failure: Feedback ID: FB22396180 TSI Case-ID: 19755043 As we have not yet received a response or a suggested workaround through these official channels, we are reaching out to the community. Has anyone else encountered this silent failure with HKWorkoutBuilder recently? Any insights or escalation help would be greatly appreciated.

Hello there, I am wanting to create a custom FSKit extension, and am trying to get the sample passthrough project running: https://developer.apple.com/documentation/fskit/building-a-passthrough-file-system I have just followed the basic instructions from the tutorial above, so have: Selected my team for the signing certificate (required for FSKit module). Built and run. Enabled "Passthrough file system" under "File System Extensions". Made a test directory to mount to: mkdir ~/test But when I run the mount command, I get the following error: mount -t passthrough ~/Documents ~/test mount: Loading resource: The operation couldn’t be completed. (com.apple.extensionKit.errorDomain error 2.) mount: exec /Library/Filesystems/passthrough.fs/Contents/Resources/mount_passthrough for /Users/xxxxxxxx/test: No such file or directory mount: /Users/xxxxxxxx/test failed with 72 The contents of /Library/Filesystems/ is empty, so I don't know if allowing the extension is meant to add something to this directory or not. Any help would be much appreciated!

According to documentation, the URLSession background tasks continue even when the app is suspended. What is the lifespan of the URLSessionDownloadDelegate object when app is suspended or terminated? Will it get re-created and re-initialize properties when the app re-launches, or will it somehow restore the existing property values? Also, urlSessionDidFinishEvents not getting called, and what do we need to do there with the backgroundCompletionHandler? Any insights are much appreciated. We are getting ready to launch and this is a roadblock. (visionOS26.4) Thank you. @Observable class DownloadManager: NSObject, URLSessionDownloadDelegate { ... let config = URLSessionConfiguration.background(withIdentifier: "TestDL") config.sessionSendsLaunchEvents = true var urlSession = URLSession(configuration: config, delegate: self, delegateQueue: nil) func downloadFiles(... { // initiate multiple file downloads concurrently for url in urlList { let task = urlSession.downloadTask(with: url) task.resume() } } func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) { ... func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64) { ... func urlSession(_: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) { ... // Not getting called ?? // Is this only called when app is suspended/terminated? func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) { print("didFinishEvents") Task { @MainActor in //urlSession?.finishTasksAndInvalidate() //urlSession = nil // not sure what to do here: if let appDelegate = UIApplication.shared.delegate as? AppDelegate, let completionHandler = appDelegate.backgroundCompletionHandler { completionHandler() appDelegate.backgroundCompletionHandler = nil } } }

I'm a first time developer, relying heavily on Claude Agent. In my app, I'm using CloudKit to sync data between devices, but after a migration something got corrupted and syncing is no longer working. I'm using SwiftData with NSPersistentCloudKitContainer. I'm using Xcode 26.4.1 on a Mac mini. I'm testing my app on the same Mac mini, running Tahoe 26.4.1 as well as an iPad 12.9 running iPadOS 26.3.1 and an iPhone running iOS 18.7.8. Sync stopped after a cachedTotal property was added to a SwiftData model, which triggered a backfill migration that wrote to all records simultaneously across multiple devices. This was followed by an iCloud sign-out/sign-in on the Mac. Here’s a summary of everything I’ve tried already: Reset All Data on all devices multiple times Deleted and reinstalled the app on all devices Deleted the CloudKit zone twice Force-deleted local SQLite store files to clear change tokens Zone and subscription both appear correct in the dashboard Change token updates when data is written (confirming uploads work) No data propagates to other devices in any direction Uploads appear to succeed (change token changes) but imports never fire on any device. In other words, writes work, reads don’t. Is there a way to fully reset the CloudKit container's production private database for a TestFlight app, or is there a way to diagnose why imports are not firing despite a valid zone and subscription?

Hi, I have installed ubuntu in a virtual machine using attached iso and everything works fine. After installing ubuntu it boots from the hard disk always. If i ever wanted to force the vm to boot from ISO how can i do it? Thanks & Regards

Hello, I’m planning to use MapKit JS for a production web/mobile application and I’m trying to better understand the quota limits and pricing model. From the documentation, I understand that MapKit JS provides a free daily limit of: 250,000 map views 25,000 service calls per Apple Developer Program membership. However, I’m not clear about what exactly happens if these limits are exceeded. My questions: If my application exceeds 250,000 map views or 25,000 service calls in a day, what happens? Will the API simply start returning errors (for example HTTP 429), or will Apple automatically charge for additional usage? Is there an official pricing model for usage above the free quota, or do we need to contact Apple to request higher limits? Are these limits strict daily hard limits that should never be exceeded in production? I’m trying to design the architecture of my application and would like to understand whether we must strictly stay below these limits or whether scaling beyond them is possible. Thank you.

Hello, I have a question similar to this post regarding MapKit JS quota limits. I understand that we can request rate limit increases, but it is not a guaranteed increase. My app is rapidly growing. What if Apple decides to not award the limit increase? Then, the directions service of my app will stop working, which would be catastrophic for my company. I need to know if the rate limit increases are guaranteed. I need to decide early on whether to use MapKit JS or another service on, because the more time that passes, the more entangled my code will get with MapKit JS. Can we get some more information on this?

I want to use Apple maps on a site instead of Google maps. Do i need to enroll as a Apple Developer to get access to the MapKit JS? (100 dollars/year)

Hi all, I'm building a coaching app for runners on top of WorkoutKit and would like to confirm a missing API — or learn that I overlooked something. The gap IntervalStep transitions deliver a haptic at T0 of the next step. The available alerts (HeartRateRangeAlert, SpeedRangeAlert, PaceRangeAlert, PowerRangeAlert, CadenceRangeAlert) are reactive — they activate when the measured value leaves the target range, not ahead of a planned step. There is no API for a "pre-roll" haptic at, say, T-15s before a high- effort step. On watchOS today, the only signal arrives exactly at step start. What I checked The WorkoutAlert protocol and concrete types — all metric-driven, no scheduling primitive. IntervalStep initializer — (.work, step: WorkoutStep). No leadTime, warning, countdown, or prepareDuration parameter. CustomWorkout — no per-step pre-roll knob. WorkoutScheduler and the rest of the surface in iOS/watchOS 26.4 SDK. If I missed something obvious, please point me at it. Filed with Apple Feedback ID: FB22708659 Has anyone here found a cleaner workaround, or seen any signal from the WorkoutKit team about pre-roll cues being on the roadmap? Thanks!

I am trying to use BLE in Flutter. I have the following three questions regarding BLE connections: At what point in iOS is the ATT MTU negotiation considered complete after a BLE connection is established? Is there an official callback or state that indicates the completion of the negotiation? Is the value used by iOS during ATT MTU negotiation fixed? If it is fixed, please tell me that value; if it varies, please tell me the conditions under which it varies. If anyone knows the answer, please let me know.

We are observing a regression in iOS 26.4 related to AppIntents, specifically AppEntity + EntityQuery. When using a single AppIntent with a parameter backed by AppEntity and EntityQuery, the query correctly returns multiple entities (e.g. ~50 items). However, in the Shortcuts app UI, only a single item is displayed. This behavior differs from iOS 26.3 and earlier, where all returned entities are correctly displayed in the selection list. This issue significantly impacts dynamic configuration use cases where AppEntity is used to represent server-driven or runtime-generated options.(The screenshots below illustrate the difference in shortcut presentation between iOS 26.4 and earlier versions.)

Both Photos and Lightroom are able to detect when a card reader has been plugged into an iPhone or iPad and a card exists with the correct DCIM format (from a digital camera). I have been unable to find the API that allows an application to do this (except using the standard file import function and making the user navigate to the card). ChatGPT tells me that Photos and Lightroom use a private API that is not made available to normal developers. Does anyone know if this is true - or if not then how to detect that a card is present using Swift?

In the last few weeks 5 users have reported my workout watch app being unable to read health data despite the permissions being enabled in the iPhone Settings app. This has been a common complaint over the years and is usually fixed by disabling the permissions; rebooting both devices; and then enabling them again. This usually nudges iOS into sending the permissions to watchOS. However that procedure doesn't work for these users, all of whom are using watchOS 10.6.2. They are using various versions of iOS 18 or 26 so it seems to be a problem with that version of watchOS, which users are usually limited to because their hardware won't support anything more up to date. It seems that unpairing and re-pairing the watch can fix the problem but not always. I looked around and it seems that other apps are having the same problem: https://www.reddit.com/r/runna/comments/1rhhs2n/runna_wont_start_an_outdoor_run_on_apple_watch/ Does anyone know a way to fix this? My current advice is to repeatedly unpair / re-pair until it works, which isn't really practical! Thanks in advance.

Hi all, I've been observing what appears to be a timing mismatch in how Apple handles Korea trial-to-paid consent, and I wanted to see if other developers are seeing the same thing. Per Korean regulations effective Feb 14, 2025, Apple must obtain explicit user consent before converting a free trial to a paid subscription. Apple handles this via email, push notifications, and an in-app consent option accessible from Settings > Subscriptions. For a 7-day trial in the Republic of Korea storefront, I'm observing: Consent push notifications (Agree to continue your subscription without interruption) start arriving ~1 day after trial redemption, at roughly hourly frequency. However, when the user taps the push and navigates to Settings > Subscriptions, there is no consent option available. The only visible action is "Cancel Free Trial". The consent option only becomes available around day 4 of the trial (i.e., 3 days before renewal, matching Apple's documented messaging cadence [1]). For the first ~3 days, users receive hourly push notifications they cannot act on. The only way to stop them is to cancel the subscription entirely. This is happening across multiple apps in the Korean App Store, so it appears to be a platform-level behavior rather than an app-specific issue. Is anyone else observing this behavior? Any insight from Apple engineers or other developers would be greatly appreciated. [1] https://developer.apple.com/help/app-store-connect/reference/in-app-purchases-and-subscriptions/consent-for-subscription-offer-conversions

I'm facing a persistent location error on real iOS device: Error Domain=kCLErrorDomain Code=1 The operation couldn’t be completed. (kCLErrorDomain error 1.)

I'm writing a read-only filesystem extension. I see that the documentation for loadResource(resource:options:replyHandler:) claims that the --rdonly option is supported, which suggests that this should be possible. However, I have never seen this option provided to my filesystem extension, even if I return usableButLimited as a probe result (where it doesn't mount at all - FB19241327) or pass the -r or -o rdonly options to the mount(8) command. Instead I see those options on the volume's activate call. But other than saving that "readonly" state (which, in my case, is always the case) and then throwing on all write-related calls I'm not sure how to actually mark the filesystem as "read-only." Without such an indicator, the user is still offered the option to do things like trash items in Finder (although of course those operations do not succeed since I throw an EROFS error in the relevant calls). It also seems like the FSKit extensions that come with the system handle read-only strangely as well. For example, for a FAT32 filesystem, if I mount it like mount -r -F -t msdos /dev/disk15s1 /tmp/mnt Then it acts... weirdly. For example, Finder doesn't know that the volume is read-only, and lets me do some operations like making new folders, although they never actually get written to disk. Writing may or may not lead to errors and/or the change just disappearing immediately (or later), which is pretty much what I'm seeing in my own filesystem extension. If I remove the -F option (thus using the kernel extension version of msdos), this doesn't happen. Are read-only filesystems currently supported by FSKit? The fact that extensions like Apple's own msdos also seem to act weirdly makes me think this is just a current FSKit limitation, although maybe I'm missing something. It's not necessarily a hard blocker given that I can prevent writes from happening in my FSKit module code (or, in my case, just not implement such features at all), but it does make for a strange experience. (I reported this as FB21068845, although I'm mostly asking here because I'm not 100% sure this is not just me missing something.)

I started a fresh “Sticker Pack App” project, add one image to it and it wouldn’t show up on emulator or device. From what I remember, there shouldn't be any coding involved, just drag and drop images of the correct format and dimensions and it should work. I tried changing the file format, dimensions etc while consulting with web and AI assistant searches and but still didn’t work. Apple support also didn't reply with anything useful but to post in the forum. I'm guessing I'm missing something trivial where a lot of us here have encountered before. Appreciate your help here, thank you in advance!

Hello, I am experiencing an issue with the App Intents framework where a parameter of type [String] (String Array) fails to persist user input in the Shortcuts app action editor. Issue Description: When adding an item to the String Array parameter in the Shortcuts app action editor, the input text automatically clears/resets to empty within less than 1 second. This happens spontaneously while the keyboard is still active, or immediately after typing, making it impossible to input any values. Environment: Xcode Version: 26.2 (17C52) iOS Version: 26.2.1 Device: iPhone 17 Code Snippet: import AppIntents import SwiftUI struct TestStringArrayIntent: AppIntent { static var title: LocalizedStringResource = "Test Array Input Bug" static var description: IntentDescription = "Reproduces the issue where String Array input clears automatically." // PROBLEM: // Input for this parameter vanishes automatically < 1s after typing. @Parameter(title: "Test Strings", default: []) var strings: [String] func perform() async throws -> some IntentResult & ReturnsValue<String> { return .result(value: "Count: \(strings.count)") } } Steps to Reproduce: Build and install the app containing the code above. Open the Shortcuts app and create a new shortcut. Add the "Test Array Input Bug" action. Tap the "Test Strings" parameter to add a new item. Type any text (e.g., "Hi"). Observe: Wait for about 1 second Observed Behavior: The text field clears itself automatically. The array remains empty ([]). Expected Behavior: The text should remain in the field and be successfully added to the array. **Filed as Feedback:**FB21808619 Thank you.

Hello Apple Developer Support / Community, I would like clarification regarding HealthKit data access behavior when an iPhone is locked. We are building an app that uses: HKObserverQuery enableBackgroundDelivery HKAnchoredObjectQuery Background execution to sync HealthKit data to our server Our specific question is: When the device is locked with passcode/Face ID protection enabled, can an app launched in the background through HKObserverQuery or other background mechanisms reliably access and read HealthKit data? We would like to understand the expected Apple-supported behavior for the following scenarios: If new HealthKit samples are written while the phone is locked, will HKObserverQuery still trigger immediately? If the observer callback is invoked while locked, can HKAnchoredObjectQuery successfully read the new samples? Is HealthKit data inaccessible while locked due to Data Protection / encrypted store behavior? Should developers expect delivery or data reads to be deferred until the user unlocks the device? We are trying to set correct expectations for background syncing and would appreciate official clarification on whether near real-time HealthKit sync is possible while the device remains locked. Relevant documentation mentions HealthKit store encryption, but we would appreciate direct confirmation for production behavior. Thank you.

Hello Apple Developer Support / Community, I would like clarification regarding HealthKit observer behavior when comparing a Flutter-based iOS app with a fully native iOS app. We are using HealthKit background delivery with: HKObserverQuery enableBackgroundDelivery HKAnchoredObjectQuery We have observed that in a Flutter-based app, HKObserverQuery callbacks appear to execute multiple times or more frequently than expected for a single data update. In comparison, a native iOS implementation using similar HealthKit logic appears more stable and predictable. We would like to understand the expected platform behavior and whether there are any known considerations from Apple’s perspective. Specific questions: Does iOS treat HealthKit observer delivery differently for apps built with Flutter versus fully native UIKit / Swift apps? Are there known issues where app lifecycle handling, Flutter engine initialization, method channels, isolates, or plugin architecture could cause repeated observer callbacks? Can repeated HKObserverQuery executions occur if queries are registered multiple times during app launches or engine restarts? Does Apple recommend any specific observer management pattern for cross-platform frameworks such as Flutter? From the HealthKit system side, should observer callback frequency be identical regardless of whether the app is Flutter or native, assuming the same iOS code is used? We are trying to determine whether this behavior is due to HealthKit delivery semantics, duplicate observer registration, Flutter lifecycle integration, or framework-related limitations. Any guidance from Apple or developers who have implemented HealthKit successfully in Flutter would be appreciated. Thank you.