When I launch the Quick Look Preview Extension target in Xcode, an app called Quick Look Simulator opens with an almost empty window: Online I read that the Terminal command qlmanage allows to test Quick Look plugins (which I think were an older format for creating Quick Look extensions), but running qlmanage -p /path/to/previewed/file -c public.text -g /path/to/QuickLookPreviewExtension.appex (where QuickLookPreviewExtension.appex is generated by the Xcode build and is located in the DerivedData folder) gives an error Can't get generator at QuickLookPreviewExtension.appex How can I debug a Quick Look Preview Extension?

Hi All, I’m puzzled by this issue: my app uses WeatherKit to fetch hourly UV-index and temperature forecasts. The same build, running on the latest iOS, succeeds on most devices but consistently fails on a few. Strangely, the paired Apple Watch version retrieves the data without problems. Could WeatherKit be applying per-user throttling? Any insight would be greatly appreciated.

How to programmatically check if ApplicationToken or ActivityCategoryToken is expired in FamilyActivityPicker? I'm building a Screen Time-based parental control app using FamilyControls and ManagedSettings. We use FamilyActivityPicker to allow the user to select apps and categories to restrict, and we apply the shield using: store.shield.applications = .specific(selection.applicationTokens) store.shield.applicationCategories = .specific(selection.categoryTokens) Sometimes, we observe that the shield silently fails to apply — no error is thrown, but the restrictions aren't enforced. I suspect this may be due to expired or invalid tokens, possibly if the app was removed or the selection became stale. My Questions: Can ApplicationToken or ActivityCategoryToken expire or become invalid over time? If yes, is there a supported or recommended way to detect whether a token is still valid before applying it to the shield? Is comparing the current shield values (store.shield.applications and store.shield.applicationCategories) after applying them a reliable validation method? What's the best practice to handle expired tokens (e.g. re-prompt the FamilyActivityPicker, or show a fallback)? What Is the Expiration Duration of Tokens from FamilyActivityPicker? Any guidance or insight from the Screen Time/FamilyControls team would be greatly appreciated! Thank you!

I'm running into a contradictory requirement involving the DeviceActivity Report extension (com.apple.deviceactivityui.report-extension) that makes it impossible to both: upload the app to App Store Connect, and install the app on a physical device. This creates a complete catch-22. 📌 Overview My extension: Path: Runner.app/PlugIns/LoADeviceActivityReport.appex Extension point: com.apple.deviceactivityui.report-extension Implementation (SwiftUI): import SwiftUI import DeviceActivity @main struct LoADeviceActivityReport: DeviceActivityReportExtension { var body: some DeviceActivityReportScene { // ... } } This is the standard SwiftUI @main DeviceActivityReportExtension template. 🟥 Side A — iOS runtime behavior (device installer) If I add either of these keys to the extension's Info.plist: NSExtensionPrincipalClass NSExtensionMainStoryboard then the app cannot be installed on a real iPhone/iPad. The device installer fails with: Error 3002 AppexBundleContainsClassOrStoryboard NSExtensionPrincipalClass and NSExtensionMainStoryboard are not allowed for extension point com.apple.deviceactivityui.report-extension. To make the app install and run, I must remove both keys completely. This leaves the extension Info.plist like: NSExtension NSExtensionPointIdentifier com.apple.deviceactivityui.report-extension With this, the app installs and runs correctly. 🟥 Side B — App Store Connect upload validator However, when I upload the IPA with the runtime-correct Info.plist, App Store Connect rejects it: State: STATE_ERROR.VALIDATION_ERROR (HTTP 409) Missing Info.plist values. No values for NSExtensionMainStoryboard or NSExtensionPrincipalClass found in extension Info.plist for Runner.app/PlugIns/LoADeviceActivityReport.appex. So ASC requires that at least one of those keys be present. 💥 The catch-22 If I add PrincipalClass / MainStoryboard: ✔ App Store Connect validation passes ❌ But the app can NOT be installed on any device (Error 3002) If I remove PrincipalClass / MainStoryboard: ✔ The app installs and runs correctly ❌ ASC rejects the upload with “Missing Info.plist values” There is currently NO Info.plist configuration that satisfies both: Runtime: "NSExtensionPrincipalClass and NSExtensionMainStoryboard are not allowed." App Store Connect: "You must include NSExtensionPrincipalClass or NSExtensionMainStoryboard." 📌 Expected behavior For SwiftUI @main DeviceActivityReportExtension, the documentation and examples suggest the correct configuration is: NSExtensionPointIdentifier com.apple.deviceactivityui.report-extension with no principal class or storyboard at all. If that is correct for runtime, ASC seems to need updated validation rules for this extension type. ❓My Questions What is the officially correct Info.plist configuration for a SwiftUI DeviceActivityReportExtension? Should principal class / storyboard not be required for this extension type? Is this a known issue with App Store Connect validation? Is there currently a workaround that allows: installation on device and successful App Store Connect upload, without violating runtime restrictions?

Hello, I have an AppClip technical issue I'd like to ask about: Our Xiaohongshu App (Version 9.14 & Build 9140845 & appid 741292507) was submitted to the App Store for review on December 18th and approved on December 19th, starting a phased rollout. This version was the first to support AppClip functionality, and as of today the app has been fully rolled out, but I still cannot activate the Xiaohongshu App Clip Card using the NFC tag (built-in URL: https://xhslink.com/n/22UG9jlaOfv?sourceid=911). I checked all the configurations of our project's AppClip target (Associated Domains:appclips:xhslink.com), the default experience in the ASC backend (URL: https://appclip.apple.com/id?p=com.xingin.discover.Clip), and the advanced experience (URL: https://xhslink.com/n/Arxpo4IVY9X), and all showed no abnormalities. Furthermore, the default experience URL, after being written with an NFC tag, can be successfully launched by tapping the NFC tag to open the Xiaohongshu App Clip Card, and the Card can also be opened normally in Safari on the phone. However, our advanced experience URL, after being written with an NFC tag, cannot be launched by tapping the Card. Therefore, my question is: Who please can help me check why the Xiaohongshu App Clip Card cannot be launched normally using the advanced experience URL? Thank you very much! My Expectations: My advanced experience URL configured on the ASC platform, such as https://xhslink.com/n/Arxpo4IVY9X, should be recognized and validated by the iOS system when the phone is near the NFC tag and reads https://xhslink.com/n/22UG9jlaOfv?sourceid=911, ultimately triggering the App Clip Card configured in Xiaohongshu's advanced experience settings. Additionally: We have already deployed a large number of NFC tags and other materials in many online stores, and the URL (https://xhslink.com/n/Arxpo4IVY9X) is built-in, and our 9.14 version is fully implemented. However, the newly developed App Clip feature is not working, which is very urgent and I hope Apple can help me find the cause of the problem and how to improve it as soon as possible. Thank you very much!

We first discovered this issue in our own product, but we were able to reproduce it even when using Apple’s official demo: https://developer.apple.com/documentation/alarmkit/scheduling-an-alarm-with-alarmkit Reproduction Steps: Set an alarm on iOS 26.1 using AlarmKit. Upgrade the device to iOS 26.2 beta 3 or later. The alarm will no longer ring. Based on our testing, versions prior to 26.2 beta 2 do not exhibit this issue, so it appears that something introduced in beta 3 has caused the regression. The results are as follows: iOS 26.1 → iOS 26.2 beta 2 or earlier: Alarms ring normally iOS 26.1 / iOS 26.2 beta 2 → iOS 26.2 beta 3 / iOS 26.2 RC: Alarms fail to ring iOS 26.2 beta 3 → iOS 26.2 RC: Alarms ring normally This issue is critical. Users currently on iOS 26.1 may experience alarms failing to ring after updating their system, which can cause real-life disruptions (e.g., being late for work). We strongly recommend addressing this as soon as possible. Xcode Version: Version 26.1.1 (17B100) Feedback ID: FB21273655

I created in my Objective-c project the AgeRange check for a special function. It is working well on an iPhone. Now I used my Mac and added my app to the TestFlight on my macOS Tahoe 26.1 Here it is directly crashing. But how can I debug an Application which is created for iPhone and iPad with Xcode? I cannot use the target myMac when running a debugging mode. So how is the debugging working for such Apps?

Hello, I have an app on the App Store built around WeatherKit and it was working fine, up until this morning when I started seeing errors when using the app. When debugging using Xcode I see the familiar error Failed to generate jwt token for: com.apple.weatherkit.authservice with error: Error Domain=WeatherDaemon.WDSJWTAuthenticatorServiceListener.Errors Code=2 "(null)" which, according to what I've read on the forums looks like an authentication error. Attaching a network debugger to the Simulator, I saw this error: This I have tried: Verify that WeatherKit is enabled on both Capabilities and App Services tabs on the Dev Portal. Toggle on/off this value and regenerate Provisioning Profiles Uninstall/reinstall Checking that I have API available calls. Nothing. If I create a new Bundle ID and sign with that, it works correctly. But this is not an option since that will force all my customers to download everything from scratch. I am getting emails from customers demanding money back and I can't figure out what has happened. The only thing I can think of, is that I started developing an Apple Watch app to complement the iOS app, but that was last week and everything was working fine.

In iOS 18 (beta 1-4) when you set openAppWhenRun = false in your AppIntent of your live activity the perform function never gets called. In iOS 16 and 17 my live activities work. I have downloaded other apps and in their live activities any button tab which doesn´t open the app is also doing nothing in iOS 18. Has anyone got this working? Any comments from an Apple engineer on this?

In my case, when I try to block calls on iOS 26, the blocking doesn't occur; the scenarios seem intermittent. If I create two CallDirectory extensions, the first blocks the numbers, but the second doesn't. Interestingly, the extension marks the number as suspicious. There's also a case where, on iOS 26 on an iPhone 16 Pro, the functionality doesn't work at all. I'd like to know if there have been any changes to the use of CallKit in iOS 26, because users of my app on iOS 18 and below report successful blocking.

Hello, I have noticed that the ShieldConfiguration is only requested when opening a target app, and never when the application token is moved to a different shield while the target app remains in foreground. This causes problems because many times the wrong ShieldConfiguration is displayed (recycled) instead of requesting a new ShieldConfiguration. This bug has been around since the introduction of the Screen Time API in 2020 and is has not been addressed. Bug reports: FB14237883 FB17902392 Please fix asap!! Not acceptable to have bugs not being addressed for more than 5 years. Most concerning: This is still reproducing on iOS 26 beta 7!! Thanks a lot for your help.

Is this intended behavior? I want my app to act like the regular Clock app and snooze alarms when user taps volume down button but apparently volume down button stops the alarm. Is this normal or am I missing something?

From https://developer.apple.com/forums/thread/803945?answerId=862153022#862153022, the testing of Age Range API was not available through xcode simulator back in Oct 2025. Is this available now? In particular: Is requestAgeRange testing available through simulator? Is requestAgeRange testing with sandbox account available through simulator? Is isEligibleForAgeFeatures available through simulator? Is isEligibleForAgeFeatures testing with sandbox account available through simulator? If the answer is "yes" to any of the above, which version of the xcode and ios version should I use? So far I didn't get any of the above working on the simulator, and I can't find any documentation on the answers above. Thank you!

I'd like to set my macOS app written in Swift as default app when opening .mp4 file. I think I can do it with setDefaultApplication(at:toOpen:completion:). https://developer.apple.com/documentation/appkit/nsworkspace/3753002-setdefaultapplication However, permission error occurs when I use it. The error is: Error Domain=NSCocoaErrorDomain Code=256 "The file couldn’t be opened." UserInfo={NSUnderlyingError=0x6000031d0150 {Error Domain=NSOSStatusErrorDomain Code=-54 "permErr: permissions error (on file open)"}} I tried to give my app full-disk access, but it didn't work. I also tried to use setDefaultApplication(at:toOpenFileAt:completion:), then it works with no error, but it effects on only one file. What I want to do is to set my app as default app of all .mp4 files. How do I achieve this? My code is like below: let bundleUrl = Bundle.main.bundleURL NSWorkspace.shared.setDefaultApplication(at: bundleUrl, toOpen: .mpeg4Movie) { error in print(error) } Thank you.

Both view and modifier versions of the FamilyActivityPicker crash randomly when selecting some items (usually the other option) throwing these in the console: [com.apple.FamilyControls.ActivityPickerExtension(1150.1)] Connection to plugin invalidated while in use AX Lookup problem - errorCode:1100 error:Permission denied portName:'com.apple.iphone.axserver' PID:22091 ( 0 AXRuntime 0x00000001c603b0fc _AXGetPortFromCache + 800 1 AXRuntime 0x00000001c603cce0 AXUIElementPerformFencedActionWithValue + 700 2 UIKit 0x0000000230de3ec8 DDE6E0C5-2AC3-3C73-8CFE-BC88DE35BB5F + 1453768 3 libdispatch.dylib 0x0000000103ef0b98 _dispatch_call_block_and_release + 32 4 libdispatch.dylib 0x0000000103ef27bc _dispatch_client_callout + 20 5 libdispatch.dylib 0x0000000103efa66c _dispatch_lane_serial_drain + 832 6 libdispatch.dylib 0x0000000103efb408 _dispatch_lane_invoke + 408 7 libdispatch.dylib 0x0000000103f08404 _dispatch_root_queue_drain_deferred_wlh + 328 8 libdispatch.dylib 0x0000000103f07a38 _dispatch_workloop_worker_thread + 444 9 libsystem_pthread.dylib 0x00000001f0824f20 _pthread_wqthread + 288 10 libsystem_pthread.dylib 0x00000001f0824fc0 start_wqthread + 8 ) This also happens in production apps like the Opal. The questions are: At least how to detect it to be able to manually reload the sheet (like what Opal does and shows an alert when this happens) How to prevent it in the first place? I really appreciate any help you can provide.

Our users report frequent crashes with the FamilyActivityPicker. Since this is a screen controlled by Apple, I'm assuming that there's nothing I can do to prevent these crashes. I'm wondering, though, if there's any way to gracefully handle these crashes? When this happens, the following is printed to the console: [com.apple.FamilyControls.ActivityPickerExtension(1121)] Connection to plugin invalidated while in use. Does anyone know how to handle/catch this error?

Hello, I’m encountering an issue with Universal Links in my iOS app. After some investigation, I found that the root cause seems to be that Apple’s request through there CDN server to access the .well-known/apple-app-site-association file is blocked by our firewall, which enforces geographic access restrictions as part of our security policy. Because of this restriction, Apple’s validation or link verification requests are being denied, and the Universal Links are not working as expected. I’d like to get some guidance from the community or Apple engineers on the following: 1. Does Apple provide an official list of IP ranges or domains that need to be allowed through the firewall for Universal Link validation? 2. Are there alternative methods to handle Universal Link verification in environments with geographic restrictions? 3. Would whitelisting specific Apple services or endpoints be a recommended or safe solution? Any input or recommendations would be greatly appreciated. Environment Details: • iOS app using Universal Links • Server protected by a firewall with regional restrictions • AASA file hosted correctly and accessible via browser Thanks in advance for your help and insights.

We integrated DeviceCheck framework into our app to prevent fraudulent call to our app service around one year ago. Recently, we received a few cases related to this function over Christmas Eve period. Based on the logs we have, it indicated both the following two functions returned errors. But we don't have the exactly errors logged and now we cannot replicate. DCAppAttestService.shared.attestKey() DCAppAttestService.shared.generateAssertion() The other finding we have is some users reporting this issue recently upgraded their devices from iOS 18 to iOS 26. So we are suspecting it's due to either the OS upgrading, or Apple's app attest service degrading. Anyone encountered the similar issues before, or have any idea regarding the root cause? Thanks!

Since I updated to iOS 18, CallKit-linked caller not display on screen of CarPlay. CarPlay display only "{App Name} Caller ID". When iOS version was 17.x, CarPlay displayed caller name of CallKit-linked contact. I think CarPlay should perform the same function as iOS 17. Please review it.

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 objects of type 'CFError')" ↑ Problem: Unable to serialize CFError to plist 2nd cancellation attempt: The download with the ID "X-XXXXXX-XXX" couldn't be canceled: Error Domain=BAErrorDomain Code=113 "The requested download operation failed because the download object did not exist." ↑ The download object we're trying to cancel supposedly doesn't exist Implementation Code // Cancel implementation func cancel(tag: String) async { let statusUpdates = AssetPackManager.shared.statusUpdates(forAssetPackWithID: tag) for await statusUpdate in statusUpdates { if case .downloading(_, let progress) = statusUpdate, progress.isCancellable { progress.cancel() } } } Analysis It appears that when the first cancellation occurs, the system internally tries to save the cancellation state to a plist, but fails to serialize the CFError object. This seems to cause an inconsistent internal state, preventing the system from correctly recognizing the download object on subsequent downloads. Questions Is there a workaround? Is there a planned fix for a future iOS version?