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“A Summary of the WWDC25 Group Lab”

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Abnormal Background Delivery Frequency of HealthKit on Specific watchOS Devices
1/ Issue Summary In our application, we use HKObserverQuery together with:HKHealthStore.enableBackgroundDelivery(for:frequency: .immediate) to enable HealthKit Background Delivery, allowing the system to wake our App Extension in the background to process health data updates. Under the same app build, identical HealthKit permission configuration, and the same watchOS version, we have observed significant differences in background delivery frequency across different devices. Specifically, on certain devices (e.g. Apple Watch Series 10, watchOS 26.2.1), the background delivery frequency is significantly reduced, behaving as if it is capped at approximately once per hour. On other control devices, under the same configuration, background delivery is triggered much more frequently and consistently, at approximately every 8–16 minutes. This behavior is consistently reproducible on the affected devices. **We would like to understand whether there are any officially recommended implementation patterns, best
1
0
411
Feb ’26
Background Assets: Second and subsequent download cancellations fail (iOS 26.0–26.3 RC)
Summary I'm using Background Assets to download Apple-hosted Asset Packs(downloadPolicy = onDemand). The first download cancellation succeeds, but on the second and subsequent downloads, progress.cancel() fails to work and the download completes to the end. Environment iOS 26.0 – 26.3 RC (all produce the same result) Xcode Version 26.2 (17C52) Using Apple-hosted Asset Packs Steps to Reproduce Start downloading an Asset Pack Call progress.cancel() during download → Succeeds Start downloading the same Asset Pack again Call progress.cancel() during download → Fails (download completes to the end) Observed Error Logs After 1st cancellation: A download with the ID X-XXXXXXXX-XXX failed: Error Domain=NSURLErrorDomain Code=-999 cancelled ↑ This is expected (cancellation succeeded) The fact that version 0 of the asset pack with the ID X-XXXXXX-XXX finished being downloaded couldn't be reported: Error Domain=NSCocoaErrorDomain Code=3851 Property list invalid for format: 200 (property lists cannot contain obje
2
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130
Feb ’26
Reply to Tahoe 26.2 and Xcode
Oh thanks! That might work. I had only tried Xcode 16. I need to be able to work on the project at home and in the college lab. My current home projects won't build in college. There will also be an issue with grading of assignments. I'll try Xcode 16.4. Will that work in college I wonder? They have Xcode 16? I'll try anyway. Thanks so much for you reply!
Feb ’26
Reply to com.apple.developer.payment-pass-provisioning missing in TestFlight build despite provisioning profile having it
Hi Quinn, I followed your steps and the profile dump is as below. It has com.apple.developer.payment-pass-provisioning => 1 : { AppIDName => XC com s_ _ _ _ _ _ d ApplicationIdentifierPrefix => [ 0 => 2 _ _ _ _ _ _ 7 ] CreationDate => 2026-02-05 15:09:44 +0000 DER-Encoded-Profile => {length = 3857, bytes = 0x30820f0d 06092a86 4886f70d 010702a0 ... 73b0c49b eb3ffec9 } DeveloperCertificates => [ 0 => {length = 1487, bytes = 0x308205cb 308204b3 a0030201 02021007 ... b474d99f 14730350 } ] Entitlements => { application-identifier => 2 _ _ _ _ _ _ 7.com.s _ _ _ _ _ _ d aps-environment => production beta-reports-active => 1 com.apple.developer.associated-domains => com.apple.developer.in-app-payments => [ 0 => merchant.com.s_ _ _ _ _ _ d ] com.apple.developer.networking.slicing.appcategory => [ 0 => communication-9000 1 => games-6014 2 => streaming-9001 ] com.apple.developer.networking.slicing.trafficcategory => [ 0 => defaultslice-1 1 => video-2 2 =
Topic: Code Signing SubTopic: Entitlements Tags:
Feb ’26
Use iTMSTransporter to upload the ipa file on Windows. ERROR: Client configuration failed
Use iTMSTransporter to upload the ipa file on Windows. ERROR: Client configuration failed [2026-02-05 16:35:17 CST] INFO: iTMSTransporter Correlation Key: a97add20-898c-4d66-81c8-a1e313f2807e-0001 [2026-02-05 16:35:17 CST] DEBUG: DataCenter: contentdelivery01.itunes.apple.com [2026-02-05 16:35:18 CST] DBG-X: Apple's web service operation return value: [2026-02-05 16:35:18 CST] DBG-X: parameter DSToken = hidden value [2026-02-05 16:35:18 CST] DBG-X: parameter DSTokenCookieName = myacinfo [2026-02-05 16:35:18 CST] ERROR: Client configuration failed Here is the error message. Package Summary: 1 package(s) were not uploaded because they had problems: C:UsersAdministratorDesktopbaggsl222.ipa - Error Messages: Client configuration failed [2026-02-05 16:35:18 CST] DBG-X: Returning 1
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40
Feb ’26
Reply to Apps do not trigger pop-up asking for permission to access local network on macOS Sequoia/Tahoe
[quote='874764022, TotalPhase, /thread/814226?answerId=874764022#874764022, /profile/TotalPhase'] We haven't setup a VM yet. [/quote] I strongly recommend that you do. It has some key benefits: It strictly constrains the problem space. For example, if you have a bug with identifying the correct broadcast interface [1], such a problem will go away in a VM because there’s only one interface. So, if the local network alert always shows up in a VM but fails on real hardware, it’s likely that this isn’t an issue with local network privacy per se, but something in your code. It makes it much easier to run tests in isolation. You can quickly iterate on your tests, creating a new clone of your ‘clean’ VM each time. It allows you to test across OS releases. If you think something broke in, say, macOS 26.2, you can easily test 26.1, 26.2, and 26.3 beta, all in parallel. Debugging these problems on real hardware just makes things harder. [quote='874764022, TotalPhase, /thread/814226?answerId=874764022#874764022, /profil
Feb ’26
UIActivityViewController not vertically scrollable when sharing CSV on specific device (Save option unreachable)
Platform UIKit iOS UIActivityViewController Environment Device (issue reported): iPhone 16 iOS Version: 26.2 App Type: UIKit / Swift (standard modal presentation of UIActivityViewController) Summary When presenting UIActivityViewController to share a CSV file, the share sheet does not allow vertical scrolling, making lower actions (including Save to Files) unreachable. The same flow works correctly when sharing a PDF, and the issue cannot be reproduced on other test devices. Steps to Reproduce Launch the app and log in Navigate to More → Reports Tap Export Report Choose Export Report (CSV) Observe the share sheet Expected Result The user should be able to vertically scroll the share sheet All share actions (including Save to Files) should be reachable Actual Result Share sheet opens but vertical scrolling is disabled Lower options (including Save to Files) are not reachable No crash or console errors
3
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410
Feb ’26
Reply to Buttons become unresponsive after using .windowStyle(.plain) with auto-hiding menu
Hi Michael, Thank you for your previous suggestion to use ViewAttachmentComponent for immersive controls. I've implemented it, However, I'm still facing two critical issues: Issue 1: Buttons in ViewAttachmentComponent Not Responding to Gaze + Pinch The buttons inside my ViewAttachmentComponent are visible and render correctly, but they do not respond to eye gaze + pinch gestures. This defeats the purpose of using visionOS's hands-free interaction model. My Implementation: ImmersiveView.swift (for panoramic images): struct ImmersiveView: View { @EnvironmentObject var model: AppModel @State private var menuEntity: Entity? @State private var isMenuVisible: Bool = true var body: some View { RealityView { content in // Invisible sphere for gesture detection let tapDetector = Entity() tapDetector.name = TapDetector tapDetector.components.set(CollisionComponent(shapes: [.generateSphere(radius: 900)])) tapDetector.components.set(InputTargetComponent()) content.add(tapDetector) // Create control menu using ViewAttachm
Topic: Spatial Computing SubTopic: General Tags:
Feb ’26
Screen Time API: ApplicationToken Mismatch / Randomization in Extensions
Description: I am developing a digital well-being application using the Screen Time API (FamilyControls, ManagedSettings, and DeviceActivity). I am encountering a critical issue where the ApplicationToken provided by the system to my app extensions suddenly changes, causing a mismatch with the tokens originally stored by the main application. The Problem: When a user selects applications via FamilyActivityPicker, we persist the FamilyActivitySelection (and the underlying ApplicationToken objects) in a shared App Group container. However, we are seeing frequent cases where the token passed into: ShieldConfigurationDataSource.configuration(shielding:in:) ShieldActionDelegate.handle(action:for:completionHandler:) ...does not match (using ==) any of the tokens previously selected and stored. IOS version: 26.2.1
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320
Feb ’26
iOS 26 Crash: _xzm_xzone_malloc_freelist_outlined in com.apple.network.connections
Hello Apple Support Team, We are seeing a production crash on iOS 26 devices that appears to originate from Apple system frameworks rather than application code. Crash Summary Crash signature: _xzm_xzone_malloc_freelist_outlined Crashed thread: com.apple.network.connections Frameworks involved: CFNetwork, Security, libdispatch, libsystem_malloc Affected OS: iOS 26.x App built with: Xcode 16 Devices: Multiple models (not device-specific) Reproducibility: Intermittent, higher frequency during app launch / background networking Observed Stack Trace (top frames) _xzm_xzone_malloc_freelist_outlined dispatch_data_create_alloc xpc_data_deserialize SecTrustEvaluateIfNecessary CFNetwork HTTPProtocol / HTTP3Connection com.apple.network.connections App Context The app uses URLSession for networking. Multiple third-party SDKs are integrated (Firebase Analytics, Dynatrace, Appsflyer, and similar analytics/monitoring SDKs). These SDKs perform concurrent background network requests, especially during app launch and
0
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195
Feb ’26
"access_denied" error during Sign in with Apple user migration (TN3159)
Hello, I am currently process of migrating an app from Team A to Team B and attempting to generate transfer identifiers using the migration endpoint: POST https://appleid.apple.com/auth/usermigrationinfo. Content-Type: application/x-www-form-urlencoded However, I am consistently receiving an { error: access_denied } response. [Current Configuration] Team A (Source): Primary App ID: com.example.primary Grouped App IDs: com.example.service (Services ID for Web) com.example.app (App ID for iOS - The one being transferred) All identifiers are under the same App Group. Team B (Destination): New App ID and Key created. [Steps Taken] Created a Client Secret (JWT) using Team A's Key ID and Team ID. The sub (subject) in the JWT is set to the Primary App ID of Team A. Requesting with client_id (Primary App ID), client_secret (JWT), and user_token. [Questions] 1. App Group Impact: Does the fact that the App being transferred is a Grouped App ID (not the Primary) affect the usermigrati
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137
Feb ’26
Reply to filecopy fails with errno 34 "Result too large" when copying from NAS
Thanks for all the details and the funny anecdote. I'll ask the user to run the cp command, but they told me they have some other work to do at the moment and need a break. In the meantime, since you said it's a SMB issue, is there a way I can reproduce the Result too large myself? Yes. To start with here: Setting a large resource fork like mentioned in that StackOverflow post causes the mentioned error Argument list too long. Was this on your SMB target or on your local (APFS) volume? If this is happening on the local volume, then I think the problem is that you're hitting the max transfer size limitation of fsetxattr. You need to break the transfer up into smaller individual segments, as copyfile does here. As a side note here, there's an open question here as to how the problem file originally got to the SMB server. On modern systems, we primarily use the resource fork to store compressed data (as I described above), but we also got out of our way to NOT export that configuration out of the system. You can
Topic: App & System Services SubTopic: Core OS Tags:
Feb ’26
Tone, Sentiment, language analysis on iPhone - Ideas
Hi everyone, I’m exploring ideas around on-device analysis of user typing behavior on iPhone, and I’d love input from others who’ve worked in this area or thought about similar problems. Conceptually, I’m interested in things like: High-level sentiment or tone inferred from what a user types over time using ML-models Identifying a user’s most important or frequent topics over a recent window (e.g., “last week”) Aggregated insights rather than raw text (privacy-preserving summaries: e.g., your typo-rate by hour to infer highly efficient time slots or take-a-break warning typing errors increase) I understand the significant privacy restrictions around keyboard input on iOS, especially for third-party keyboards and system text fields. I’m not trying to bypass those constraints—rather, I’m curious about what’s realistically possible within Apple’s frameworks and policies. (For instance, Grammarly as a correction tool includes some information about tone) Questions I’m thinking through: Are there any reco
1
0
621
Feb ’26
Live Activities widget extension does not reflect updated SwiftUI UI (custom views/assets appear ignored)
Hello Apple Developer Technical Support, I’m following up on case #102807413324 and submitting this as a code-level support request. We are integrating iOS Live Activities (ActivityKit + WidgetKit extension written in SwiftUI) into an Expo/React Native app. We’re seeing behavior where the Live Activity UI shown on the Lock Screen appears to “stick” to an older layout and ignores updated SwiftUI code and/or bundled assets, even after rebuilding, reinstalling, and removing existing Live Activities before testing again. Environment Device: iPhone 13 iOS: 26.2 macOS: 15.7.3 (24G419) Xcode: 16.4 (16F6) Expo SDK: 52 React Native: 0.76.9 expo-live-activity: ^0.4.2 Build type: Ad-Hoc signed IPA (EAS local build) Summary We have a WidgetKit extension target (LiveActivity.appex, bundle id: stimul8.LiveActivity) using ActivityConfiguration(for: LiveActivityAttributes.self). The extension contains multiple SwiftUI views selected via a “route” (derived from deepLinkUrl / title / subtitle), and uses images/backgro
1
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136
Feb ’26
Abnormal Background Delivery Frequency of HealthKit on Specific watchOS Devices
1/ Issue Summary In our application, we use HKObserverQuery together with:HKHealthStore.enableBackgroundDelivery(for:frequency: .immediate) to enable HealthKit Background Delivery, allowing the system to wake our App Extension in the background to process health data updates. Under the same app build, identical HealthKit permission configuration, and the same watchOS version, we have observed significant differences in background delivery frequency across different devices. Specifically, on certain devices (e.g. Apple Watch Series 10, watchOS 26.2.1), the background delivery frequency is significantly reduced, behaving as if it is capped at approximately once per hour. On other control devices, under the same configuration, background delivery is triggered much more frequently and consistently, at approximately every 8–16 minutes. This behavior is consistently reproducible on the affected devices. **We would like to understand whether there are any officially recommended implementation patterns, best
Replies
1
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0
Views
411
Activity
Feb ’26
Background Assets: Second and subsequent download cancellations fail (iOS 26.0–26.3 RC)
Summary I'm using Background Assets to download Apple-hosted Asset Packs(downloadPolicy = onDemand). The first download cancellation succeeds, but on the second and subsequent downloads, progress.cancel() fails to work and the download completes to the end. Environment iOS 26.0 – 26.3 RC (all produce the same result) Xcode Version 26.2 (17C52) Using Apple-hosted Asset Packs Steps to Reproduce Start downloading an Asset Pack Call progress.cancel() during download → Succeeds Start downloading the same Asset Pack again Call progress.cancel() during download → Fails (download completes to the end) Observed Error Logs After 1st cancellation: A download with the ID X-XXXXXXXX-XXX failed: Error Domain=NSURLErrorDomain Code=-999 cancelled ↑ This is expected (cancellation succeeded) The fact that version 0 of the asset pack with the ID X-XXXXXX-XXX finished being downloaded couldn't be reported: Error Domain=NSCocoaErrorDomain Code=3851 Property list invalid for format: 200 (property lists cannot contain obje
Replies
2
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0
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130
Activity
Feb ’26
Reply to Tahoe 26.2 and Xcode
Oh thanks! That might work. I had only tried Xcode 16. I need to be able to work on the project at home and in the college lab. My current home projects won't build in college. There will also be an issue with grading of assignments. I'll try Xcode 16.4. Will that work in college I wonder? They have Xcode 16? I'll try anyway. Thanks so much for you reply!
Replies
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Views
Activity
Feb ’26
Reply to com.apple.developer.payment-pass-provisioning missing in TestFlight build despite provisioning profile having it
Hi Quinn, I followed your steps and the profile dump is as below. It has com.apple.developer.payment-pass-provisioning => 1 : { AppIDName => XC com s_ _ _ _ _ _ d ApplicationIdentifierPrefix => [ 0 => 2 _ _ _ _ _ _ 7 ] CreationDate => 2026-02-05 15:09:44 +0000 DER-Encoded-Profile => {length = 3857, bytes = 0x30820f0d 06092a86 4886f70d 010702a0 ... 73b0c49b eb3ffec9 } DeveloperCertificates => [ 0 => {length = 1487, bytes = 0x308205cb 308204b3 a0030201 02021007 ... b474d99f 14730350 } ] Entitlements => { application-identifier => 2 _ _ _ _ _ _ 7.com.s _ _ _ _ _ _ d aps-environment => production beta-reports-active => 1 com.apple.developer.associated-domains => com.apple.developer.in-app-payments => [ 0 => merchant.com.s_ _ _ _ _ _ d ] com.apple.developer.networking.slicing.appcategory => [ 0 => communication-9000 1 => games-6014 2 => streaming-9001 ] com.apple.developer.networking.slicing.trafficcategory => [ 0 => defaultslice-1 1 => video-2 2 =
Topic: Code Signing SubTopic: Entitlements Tags:
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Feb ’26
Use iTMSTransporter to upload the ipa file on Windows. ERROR: Client configuration failed
Use iTMSTransporter to upload the ipa file on Windows. ERROR: Client configuration failed [2026-02-05 16:35:17 CST] INFO: iTMSTransporter Correlation Key: a97add20-898c-4d66-81c8-a1e313f2807e-0001 [2026-02-05 16:35:17 CST] DEBUG: DataCenter: contentdelivery01.itunes.apple.com [2026-02-05 16:35:18 CST] DBG-X: Apple's web service operation return value: [2026-02-05 16:35:18 CST] DBG-X: parameter DSToken = hidden value [2026-02-05 16:35:18 CST] DBG-X: parameter DSTokenCookieName = myacinfo [2026-02-05 16:35:18 CST] ERROR: Client configuration failed Here is the error message. Package Summary: 1 package(s) were not uploaded because they had problems: C:UsersAdministratorDesktopbaggsl222.ipa - Error Messages: Client configuration failed [2026-02-05 16:35:18 CST] DBG-X: Returning 1
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0
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40
Activity
Feb ’26
Reply to Cannot preview in this file – SwiftUI Preview referencing deleted simulator
Hello @Developer Tools Engineer , Thank you for supporting. I've tried to delete previews sims but the issue was not solved. I'm using the Company Managed Device so I don't have permission to logging profile. I can share you summary text of Preview, Could you take a look on that? Thank you, Cuong Trinh previews_diagnostics_summary.txt
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Feb ’26
Reply to Apps do not trigger pop-up asking for permission to access local network on macOS Sequoia/Tahoe
[quote='874764022, TotalPhase, /thread/814226?answerId=874764022#874764022, /profile/TotalPhase'] We haven't setup a VM yet. [/quote] I strongly recommend that you do. It has some key benefits: It strictly constrains the problem space. For example, if you have a bug with identifying the correct broadcast interface [1], such a problem will go away in a VM because there’s only one interface. So, if the local network alert always shows up in a VM but fails on real hardware, it’s likely that this isn’t an issue with local network privacy per se, but something in your code. It makes it much easier to run tests in isolation. You can quickly iterate on your tests, creating a new clone of your ‘clean’ VM each time. It allows you to test across OS releases. If you think something broke in, say, macOS 26.2, you can easily test 26.1, 26.2, and 26.3 beta, all in parallel. Debugging these problems on real hardware just makes things harder. [quote='874764022, TotalPhase, /thread/814226?answerId=874764022#874764022, /profil
Replies
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Activity
Feb ’26
UIActivityViewController not vertically scrollable when sharing CSV on specific device (Save option unreachable)
Platform UIKit iOS UIActivityViewController Environment Device (issue reported): iPhone 16 iOS Version: 26.2 App Type: UIKit / Swift (standard modal presentation of UIActivityViewController) Summary When presenting UIActivityViewController to share a CSV file, the share sheet does not allow vertical scrolling, making lower actions (including Save to Files) unreachable. The same flow works correctly when sharing a PDF, and the issue cannot be reproduced on other test devices. Steps to Reproduce Launch the app and log in Navigate to More → Reports Tap Export Report Choose Export Report (CSV) Observe the share sheet Expected Result The user should be able to vertically scroll the share sheet All share actions (including Save to Files) should be reachable Actual Result Share sheet opens but vertical scrolling is disabled Lower options (including Save to Files) are not reachable No crash or console errors
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3
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0
Views
410
Activity
Feb ’26
Reply to Buttons become unresponsive after using .windowStyle(.plain) with auto-hiding menu
Hi Michael, Thank you for your previous suggestion to use ViewAttachmentComponent for immersive controls. I've implemented it, However, I'm still facing two critical issues: Issue 1: Buttons in ViewAttachmentComponent Not Responding to Gaze + Pinch The buttons inside my ViewAttachmentComponent are visible and render correctly, but they do not respond to eye gaze + pinch gestures. This defeats the purpose of using visionOS's hands-free interaction model. My Implementation: ImmersiveView.swift (for panoramic images): struct ImmersiveView: View { @EnvironmentObject var model: AppModel @State private var menuEntity: Entity? @State private var isMenuVisible: Bool = true var body: some View { RealityView { content in // Invisible sphere for gesture detection let tapDetector = Entity() tapDetector.name = TapDetector tapDetector.components.set(CollisionComponent(shapes: [.generateSphere(radius: 900)])) tapDetector.components.set(InputTargetComponent()) content.add(tapDetector) // Create control menu using ViewAttachm
Topic: Spatial Computing SubTopic: General Tags:
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Activity
Feb ’26
Screen Time API: ApplicationToken Mismatch / Randomization in Extensions
Description: I am developing a digital well-being application using the Screen Time API (FamilyControls, ManagedSettings, and DeviceActivity). I am encountering a critical issue where the ApplicationToken provided by the system to my app extensions suddenly changes, causing a mismatch with the tokens originally stored by the main application. The Problem: When a user selects applications via FamilyActivityPicker, we persist the FamilyActivitySelection (and the underlying ApplicationToken objects) in a shared App Group container. However, we are seeing frequent cases where the token passed into: ShieldConfigurationDataSource.configuration(shielding:in:) ShieldActionDelegate.handle(action:for:completionHandler:) ...does not match (using ==) any of the tokens previously selected and stored. IOS version: 26.2.1
Replies
2
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0
Views
320
Activity
Feb ’26
iOS 26 Crash: _xzm_xzone_malloc_freelist_outlined in com.apple.network.connections
Hello Apple Support Team, We are seeing a production crash on iOS 26 devices that appears to originate from Apple system frameworks rather than application code. Crash Summary Crash signature: _xzm_xzone_malloc_freelist_outlined Crashed thread: com.apple.network.connections Frameworks involved: CFNetwork, Security, libdispatch, libsystem_malloc Affected OS: iOS 26.x App built with: Xcode 16 Devices: Multiple models (not device-specific) Reproducibility: Intermittent, higher frequency during app launch / background networking Observed Stack Trace (top frames) _xzm_xzone_malloc_freelist_outlined dispatch_data_create_alloc xpc_data_deserialize SecTrustEvaluateIfNecessary CFNetwork HTTPProtocol / HTTP3Connection com.apple.network.connections App Context The app uses URLSession for networking. Multiple third-party SDKs are integrated (Firebase Analytics, Dynatrace, Appsflyer, and similar analytics/monitoring SDKs). These SDKs perform concurrent background network requests, especially during app launch and
Replies
0
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0
Views
195
Activity
Feb ’26
"access_denied" error during Sign in with Apple user migration (TN3159)
Hello, I am currently process of migrating an app from Team A to Team B and attempting to generate transfer identifiers using the migration endpoint: POST https://appleid.apple.com/auth/usermigrationinfo. Content-Type: application/x-www-form-urlencoded However, I am consistently receiving an { error: access_denied } response. [Current Configuration] Team A (Source): Primary App ID: com.example.primary Grouped App IDs: com.example.service (Services ID for Web) com.example.app (App ID for iOS - The one being transferred) All identifiers are under the same App Group. Team B (Destination): New App ID and Key created. [Steps Taken] Created a Client Secret (JWT) using Team A's Key ID and Team ID. The sub (subject) in the JWT is set to the Primary App ID of Team A. Requesting with client_id (Primary App ID), client_secret (JWT), and user_token. [Questions] 1. App Group Impact: Does the fact that the App being transferred is a Grouped App ID (not the Primary) affect the usermigrati
Replies
1
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0
Views
137
Activity
Feb ’26
Reply to filecopy fails with errno 34 "Result too large" when copying from NAS
Thanks for all the details and the funny anecdote. I'll ask the user to run the cp command, but they told me they have some other work to do at the moment and need a break. In the meantime, since you said it's a SMB issue, is there a way I can reproduce the Result too large myself? Yes. To start with here: Setting a large resource fork like mentioned in that StackOverflow post causes the mentioned error Argument list too long. Was this on your SMB target or on your local (APFS) volume? If this is happening on the local volume, then I think the problem is that you're hitting the max transfer size limitation of fsetxattr. You need to break the transfer up into smaller individual segments, as copyfile does here. As a side note here, there's an open question here as to how the problem file originally got to the SMB server. On modern systems, we primarily use the resource fork to store compressed data (as I described above), but we also got out of our way to NOT export that configuration out of the system. You can
Topic: App & System Services SubTopic: Core OS Tags:
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Activity
Feb ’26
Tone, Sentiment, language analysis on iPhone - Ideas
Hi everyone, I’m exploring ideas around on-device analysis of user typing behavior on iPhone, and I’d love input from others who’ve worked in this area or thought about similar problems. Conceptually, I’m interested in things like: High-level sentiment or tone inferred from what a user types over time using ML-models Identifying a user’s most important or frequent topics over a recent window (e.g., “last week”) Aggregated insights rather than raw text (privacy-preserving summaries: e.g., your typo-rate by hour to infer highly efficient time slots or take-a-break warning typing errors increase) I understand the significant privacy restrictions around keyboard input on iOS, especially for third-party keyboards and system text fields. I’m not trying to bypass those constraints—rather, I’m curious about what’s realistically possible within Apple’s frameworks and policies. (For instance, Grammarly as a correction tool includes some information about tone) Questions I’m thinking through: Are there any reco
Replies
1
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0
Views
621
Activity
Feb ’26
Live Activities widget extension does not reflect updated SwiftUI UI (custom views/assets appear ignored)
Hello Apple Developer Technical Support, I’m following up on case #102807413324 and submitting this as a code-level support request. We are integrating iOS Live Activities (ActivityKit + WidgetKit extension written in SwiftUI) into an Expo/React Native app. We’re seeing behavior where the Live Activity UI shown on the Lock Screen appears to “stick” to an older layout and ignores updated SwiftUI code and/or bundled assets, even after rebuilding, reinstalling, and removing existing Live Activities before testing again. Environment Device: iPhone 13 iOS: 26.2 macOS: 15.7.3 (24G419) Xcode: 16.4 (16F6) Expo SDK: 52 React Native: 0.76.9 expo-live-activity: ^0.4.2 Build type: Ad-Hoc signed IPA (EAS local build) Summary We have a WidgetKit extension target (LiveActivity.appex, bundle id: stimul8.LiveActivity) using ActivityConfiguration(for: LiveActivityAttributes.self). The extension contains multiple SwiftUI views selected via a “route” (derived from deepLinkUrl / title / subtitle), and uses images/backgro
Replies
1
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0
Views
136
Activity
Feb ’26