We have a that relies on accurate GPS location but we’ve noticed that every now and then the location ‘jumps’ a few hundred meters to a different location but reports horizonal accuracy less than 10m. we think the device is picking up a rough location from a local WiFi rather than internal gps sensors. can we a) disable WiFi location Updates? b) identify WiFi location Updates? thank You

I see this in Tahoe Beta release notes macOS now supports the Apple Sparse Image Format (ASIF). These space-efficient images can be created with the diskutil image command-line tool or the Disk Utility application and are suitable for various uses, including as a backing store for virtual machines storage via the Virtualization framework. See VZDiskImageStorageDeviceAttachment. (152040832) I'm developing a macOS app using the Virtualization framework and need to create disk images in the ASIF (Apple Sparse Image Format) to make use of the new feature in Tahoe Is there an official way to create/resize ASIF images programmatically using Swift? I couldn’t find any public API that supports this directly. Any guidance or recommendations would be appreciated. Thanks!

All the threads only contain system calls. The crashed thread only contains a single call to my app's code which is main.swift:13. What could cause such a crash? crash.crash

Original discussion pre iOS 26 Our app uses Auth0 with HTTPS callback, we've found the issue where AASA file is not ready immediately when app is initially launched, which is the exact issue from the above link. The issue seems mostly fixed on later versions on iOS 18, however, we are seeing some indications of a regression on iOS 26. Here's some measurement over the last week. | Platform | iOS 18 | iOS 26 | |---------------|----------|--------| | Adoption rate | 55% | 45% | | Issue seen | 1 | 5 | | Recover? | Yes | No | This only 1 iOS 18 instance was able to recover after 1 second after the first try, however, all iOS 26 instances were not able to recover in couple tens of seconds and less than 1 minute, the user eventually gave up. Is there a way to force app to update AASA file? Are there some iOS setting (like using a VPN) that could potentially downgrade the AASA fetch? Related Auth0 discussion: https://community.auth0.com/t/ios-application-not- recognizing-auth0-associated-domain/134847/27

Could someone please explain how to use a custom sound when setting up an alarm using AlarmKit? It keeps playing a default sound. Also, I keep having an issue where the alarm sound plays but doesn’t show the alarm interface buttons unless the screen is locked.

We tested call blocking on iOS 26 and noticed something strange: the call will not be blocked if an outgoing call was made to its number before. Nevertheless, it will be blocked if we delete the outgoing call record from the Phone.app Recents. This behavior looks like a bug and is unexpected when using our application. Was this a planned callkit change in iOS 26? Is it possible to get the correct call blocking behavior back? We set blocking rules with addBlockingEntry(withNextSequentialPhoneNumber:) and this problem is not present in iOS 18 and earlier. Thank you in advance

Hello, I'm trying to adopt the new BGContinuedProcessingTask API, but I'm having a little trouble imagining how the API authors intended it be used. I saw the WWDC talk, but it lacked higher-level details about how to integrate this API, and I can't find a sample project. I notice that we can list wildcard background task identifiers in our Info.plist files now, and it appears this is to be used with continued tasks - a user might start one video encoding, then while it is ongoing, enqueue another one from the same app, and these tasks would have identifiers such as "MyApp.VideoEncoding.ABCD" and "MyApp.VideoEncoding.EFGH" to distinguish them. When it comes to implementing this, is the expectation that we: a) Register a single handler for the wildcard pattern, which then figures out how to fulfil each request from the identifier of the passed-in task instance? Or b) Register a unique handler for each instance of the wildcard pattern? Since you can't unregister handlers, any resources captured by the handler would be leaked, so you'd need to make sure you only register immediately before submission - in other words register + submit should always be called as a pair. Of course, I'd like to design my application to use this API as the authors intended it be used, but I'm just not entirely sure what that is. When I try to register a single handler for a wildcard pattern, the system rejects it at runtime (while allowing registrations for each instance of the pattern, indicating that at least my Info.plist is configured correctly). That points towards option B. If it is option B, it's potentially worth calling that out in documentation - or even better, perhaps introduce a new call just for BGContinuedProcessingTask instead of the separate register + submit calls? Thanks for your insight. K Aside: Also, it would be really nice if the handler closure would be async. Currently if you need to await on something, you need to launch an unstructured Task, but that causes issues since BGContinuedProcessingTask is not Sendable, so you can't pass it in to that Task to do things like update the title or mark the BGTask as complete.

Hi all, I am adding the following StoreKit 2 code to my app, and I don't see anything in Apple's documentation that explains the unverified case. When is that case exercised? Is it when someone has tampered with the app receipt? Or is it for more mundane things like poor network connectivity? // Apple's docstring on `shared` states: // If your app fails to get an AppTransaction by accessing the shared property, see refresh(). // Source: https://developer.apple.com/documentation/storekit/apptransaction/shared var appTransaction: VerificationResult<AppTransaction>? do { appTransaction = try await AppTransaction.shared } catch { appTransaction = try? await AppTransaction.refresh() } guard let appTransaction = appTransaction else { AppLogger.error("Couldn't get the app store transaction") return false } switch appTransaction { case .unverified(appTransaction, verificationError): // For what reasons should I expect this branch to be entered in production? return await inspectAppTransaction(appTransaction, verifiedByApple: false) case .verified(let appTransaction): return await inspectAppTransaction(appTransaction, verifiedByApple: true) } Thank you, Lou

I've written an PDF viewing app, and there seems to be a correlation between files opened by the app and files that Time Machine says couldn't be backed up. The files can still "not be backed up", even after the app has closed them. Is there anything I specifically need to do to sever the link between the file and the app?

I've been wondering what is the memory limit for network extensions. Specifically, I'm using the NEPacketTunnelProvider extension point.The various posts on this forum mention 5 MB and 6 MB for 32-bit and 64-bit respectively. However I find that (at least on iOS 10) the upper limit seems to be 15 MB. Is this the new memory limit for extensions?

Hello everyone, We are in the process of migrating a high-performance storage KEXT to DriverKit. During our initial validation phase, we noticed a performance gap between the DEXT and the KEXT, which prompted us to try and optimize our I/O handling process. Background and Motivation: Our test hardware is a RAID 0 array of two HDDs. According to AJA System Test, our legacy KEXT achieves a write speed of about 645 MB/s on this hardware, whereas the new DEXT reaches about 565 MB/s. We suspect the primary reason for this performance gap might be that the DEXT, by default, uses a serial work-loop to submit I/O commands, which fails to fully leverage the parallelism of the hardware array. Therefore, to eliminate this bottleneck and improve performance, we configured a dedicated parallel dispatch queue (MyParallelIOQueue) for the UserProcessParallelTask method. However, during our implementation attempt, we encountered a critical issue that caused a system-wide crash. The Operation Causing the Panic: We configured MyParallelIOQueue using the following combination of methods: In the .iig file: We appended the QUEUENAME(MyParallelIOQueue) macro after the override keyword of the UserProcessParallelTask method declaration. In the .cpp file: We manually created a queue with the same name by calling the IODispatchQueue::Create() function within our UserInitializeController method. The Result: This results in a macOS kernel panic during the DEXT loading process, forcing the user to perform a hard reboot. After the reboot, checking with the systemextensionsctl list command reveals the DEXT's status as [activated waiting for user], which indicates that it encountered an unrecoverable, fatal error during its initialization. Key Code Snippets to Reproduce the Panic: In .iig file - this was our exact implementation: class DRV_MAIN_CLASS_NAME: public IOUserSCSIParallelInterfaceController { public: virtual kern_return_t UserProcessParallelTask(...) override QUEUENAME(MyParallelIOQueue); }; In .h file: struct DRV_MAIN_CLASS_NAME_IVars { // ... IODispatchQueue* MyParallelIOQueue; }; In UserInitializeController implementation: kern_return_t IMPL(DRV_MAIN_CLASS_NAME, UserInitializeController) { // ... // We also included code to manually create the queue. kern_return_t ret = IODispatchQueue::Create("MyParallelIOQueue", kIODispatchQueueReentrant, 0, &ivars->MyParallelIOQueue); if (ret != kIOReturnSuccess) { // ... error handling ... } // ... return kIOReturnSuccess; } Our Question: What is the officially recommended and most stable method for configuring UserProcessParallelTask_Impl() to use a parallel I/O queue? Clarifying this is crucial for all developers pursuing high-performance storage solutions with DriverKit. Any explanation or guidance would be greatly appreciated. Best Regards, Charles

When I tap on one of the buttons in the ShieldAction extension I want to close the shield and open the parent app instead of the shielded app. Is there any way of doing this using the Screen Time API? class ShieldActionExtension: ShieldActionDelegate {      override func handle(action: ShieldAction, for application: ApplicationToken, completionHandler: @escaping (ShieldActionResponse) -> Void) {     // Handle the action as needed.           let store = ManagedSettingsStore()               switch action {     case .primaryButtonPressed:       //TODO - open parent app       completionHandler(.defer)     case .secondaryButtonPressed:       //remove shield       store.shield.applications?.remove(application)       completionHandler(.defer)         @unknown default:       fatalError()     }   }   }

Background: We are developing a cross-platform mobile application that communicates with a custom NFC-enabled hardware device. The hardware expects ISO7816-style APDU commands for data exchange and functions correctly with Android using the IsoDep protocol. Observed Issue on iOS: On iOS, the tag is only detectable via NFCNdefReaderSession, which provides access to INFCNdefTag. Attempting to use NFCTagReaderSession with NFCPollingOption.Iso14443 (which is required for APDU communication) results in no tag detection. As a result, the tag is inaccessible for APDU-based communication on iOS. Since NFCNdefReaderSession does not support APDU, we are unable to establish the required command channel. Constraints: The hardware firmware cannot be changed to support NDEF-based command interpretation. The device expects raw ISO-DEP APDU commands (i.e., Class-Instruction-Param1-Param2-Data-Le). Impact: The lack of ISO7816 tag detection on iOS prevents the app from sending APDU commands, resulting in a platform-specific feature limitation. Functionality that relies on secure, structured APDU communication is unavailable to iOS users, even though it works seamlessly on Android.

I'm unable to view Changes or Diff View in the Deploy Schema Changes Dialog due to an Internal Error.

Platforms: macOS 15.x (Sequoia), Intel-Based App type: Endpoint Security (ES) client, notarized Developer ID app + LaunchDaemon Goal: Boot-time ES client that runs on any Mac (managed or unmanaged) Summary Our ES client launches and functions when started manually (terminal), but when loaded as a LaunchDaemon it fails to initialize the ES connection with: (libEndpointSecurity.dylib) Failed to open service: 0xe00002d8: Caller lacks TCC authorization for Full Disk Access We can’t find a supported way to grant Full Disk Access (SystemPolicyAllFiles) to a system daemon on unmanaged Macs (no MDM). Local installation of a PPPC (TCC) profile is rejected as “must originate from a user-approved MDM server.” We’re seeking confirmation: Is MDM now the only supported path for a boot-time ES daemon that requires FDA? If so, what’s Apple’s recommended approach for unmanaged Macs? Environment & Artifacts Binary (path placeholder): /Library/Application Support///App/.app/Contents/MacOS/ Universal (x86_64 + arm64) Notarized, hardened runtime; Developer ID Team <TEAM_ID> Entitlements include: com.apple.developer.endpoint-security.client (present) Daemon plist (simplified; placeholders used): <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"><dict> <key>Label</key> <string>com.example.esd</string> <key>Program</key> <string>/Library/Application Support/<VENDOR>/<PRODUCT>/Platform/<daemon-exec></string> <key>WorkingDirectory</key> <string>/Library/Application Support/<VENDOR>/<PRODUCT>/Platform</string> <key>RunAtLoad</key><true/> <key>KeepAlive</key><true/> </dict></plist> Designated requirement (abridged & masked): identifier "<BUNDLE_ID>" and anchor apple generic and certificate 1[...] and certificate leaf[...] and certificate leaf[subject.OU] = "<TEAM_ID>" What works Launching the ES client manually (interactive shell) succeeds; ES events flow. Signature, notarization, entitlements, Gatekeeper: all OK. What fails (daemon) launchctl print system/ shows it starts, but Console logs: (libEndpointSecurity.dylib) Failed to open service: 0xe00002d8:Caller lacks TCC authorization for Full Disk Access System TCC DB shows ES consent rows but no allow for TCCServiceSystemPolicyAllFiles for the daemon binary. Installing a PPPC mobileconfig locally (system scope) is blocked as “must originate from a user-approved MDM server.” Repro (minimal) Install app bundle + LaunchDaemon plist above (placeholders). Verify entitlements & notarization: codesign -dvvv --entitlements :- "" spctl --assess --type execute -vv "" Start daemon & watch logs: sudo launchctl bootstrap system "/Library/LaunchDaemons/.plist" log stream --style compact --predicate 'process == "" OR subsystem == "com.apple.TCC"' --info Observe FDA denial message only in daemon context. Attempt to add FDA via PPPC profile (system scope) → rejected unless installed by user-approved MDM. Questions for Apple On macOS 14/15, is Full Disk Access for system daemons strictly MDM-only via PPPC (i.e., not installable locally)? Under what conditions would libEndpointSecurity report a Full Disk Access denial at client initialization, given ES consent is distinct from FDA? For unmanaged Macs needing boot-time ES processing, does Apple recommend a split: root LaunchDaemon (ES subscription; no protected file I/O) + per-user LaunchAgent (user-granted FDA) via XPC for on-demand disk access? Would moving ES connection code into a System Extension change FDA requirements for unmanaged devices, or is FDA still governed by PPPC/MDM? If behavior changed across releases, can Apple confirm the intended policy so vendors can document MDM requirements vs. unmanaged install paths? What we’ve tried Verified signature, notarization, hardened runtime, ES entitlement present. Confirmed context difference: manual run OK; daemon fails. Inspected system TCC: ES consent rows present; no FDA allow for daemon. Tried installing system-scoped PPPC locally → blocked as “must originate from a user-approved MDM server.” Considered LaunchAgent-only, but ES needs root; evaluating daemon+agent split to keep ES in root and put FDA-gated work in user space. What we need A definitive statement on the supported way to grant FDA to a system daemon on macOS 14/15. If MDM PPPC is required, we’ll ship “daemon mode requires MDM” and provide a daemon+agent fallback for unmanaged devices. If a compliant non-MDM path exists for daemon FDA on unmanaged Macs, please share exact steps. Thanks! Happy to provide additional logs privately if helpful.

I can develop a PacketTunnelProvider on Mac with xcode. I work with my self codesign. But when I sign it with Developer ID after read https://developer.apple.com/forums/thread/737894 , it still fail when I turn on the vpn .

I need to detect the triggering of an auto-mount operation when accessing the path to a formerly unknown mount point at the file system (BSD, POSIX, NSURL) level, and how to wait for it to finish the operation. Network shares can have sub-volumes on them Consider a Windows server. Let's say there's a SMB sharepoint at C:\Shared. It has some folders, one of which is at C:\Shared\More. Furthermore, there's another partition (volume) on the PC, which is mounted at C:\Shared\More\OtherVol. If you mount the initial share on a Mac with a recent macOS, macOS initially only sees a single mount point at /Volumes/Shared, which can be checked with the "mount" command. Now, if you use Finder to dive into the Shared/More folder, Finder will trigger an auto-mount action on the containing OtherVol folder, and after that, the "mount" command will list two mount points from this server, the second being at /Volumes/Shared/More/OtherVol. (This was a bit surprising to me - I'd have thought that Windows or SMB would hide the fact that the share has sub-volumes, and simply show them as directories - and that's what it did in older macOS versions indeed, e.g. in High Sierra. But in Sequoia, these sub-volumes on the Windows side are mirrored on the Mac side, and they behave accordingly) Browse the volume, including its sub-volumes Now, I have a program that tries to dive into all the folders of this Shared volume, even if it was just freshly mounted and there's no mountpoint at /Volumes/Shared/More/OtherVol known yet (i.e. the user didn't use Finder to explore it). This means, that if my program, e.g. using a simple recursive directory scan, reaches /Volumes/Shared/More/OtherVol, the item will not appear as a volume but as an empty folder. E.g, if I get the NSURLIsVolumeKey value, it'll be false. Only once I try to enter the empty dir, listing its contents, which will return no items, an auto-mount action will get triggered, which will add the mountpoint at the path. So, in order to browse the actual contents of the OtherVol directory, I'd have to detect this auto-mount operation somehow, wait for it to finish mounting, and then re-enter the same directory so that I now see the mounted content. How do I do that? I.e. how do I tell that a dir is actually a auto-mount point and how do I wait for it to get auto-mounted before I continue to browse its contents? Note that newer macOS versions do not use fstab any more, so that's of no help here. Can the DA API help? Do I need to use the old Disk Arbitration functions for this, somehow? I have used the DA framework in the part to prevent auto-mounting, so I imagine I could hook into that handler, and if I get a callback for a mount operation, I could then queue the newly mounted volume for scanning. The problem, however, is that my scanning code may, having only seen an empty directory at the not-yet-mounted mountpoint, already decided that there's nothing there and finished its operation. I'd need some reliable method that lets my recursive scanning code know whether an auto-mount has been triggered and it therefore needs to wait for the DA callback. So, is there some signal that will let me know IMMEDIATELY after entering the empty mountpoint directory that an auto-mount op is on the way? Because I suspect that the DA callbacks come with a delay, and therefore would come too late if I used that as the notifier that I have to wait.

I'm encountering a strange behavior with one of my home's on Home app while I'm off network. When I launch the app it indicates that the hub is not responding and all of my devices are unavailable. However, on the menu bar at the bottom if I switch to "Automation" and back to "Home" the pop-up goes away and my devices are accessible again (sometimes this take a few attempts). Siri is also able to consistently control my devices without an issue. The same behavior occurs with Home app on other devices (e.g. Mac) and with other members that have access to the household. 3rd party HomeKit app like "Controller" does not have an issue. This issue began with iOS 26 and I haven't had much luck resolving the issue. I already tried rebooting everything, including removing and re-adding an Apple TV (home hub). I have other homes shared with me in Home App with similar network/environment that are still working. The home I'm having issues has the most number of devices though (over 100+).

~5% of our users when downloading the iOS application from the Apple Store for the first time are unable to enrol a Passkey and experience an error saying the application is not associated with [DOMAIN]. The error message thrown by the iOS credentials API is "The operation couldn't be completed. Application with identifier [APPID] is not associated with domain [DOMAIN]" We have raised this via the developer support portal with case id: 102315543678 Question: Why does the AASA file fail to fetch on app install and is there anything that can be done to force the app to fetch the file? Can this bug be looked at urgently as it is impacting security critical functionality? Other Debugging Observations We have confirmed that our AASA file is correctly formatted and hosted on the Apple CDN. Under normal circumstances the association is created on install and Passkey enrolment works as intended. We have observed that when customers uninstall/reinstall the app this often, but not always, resolves the issue. We also know this issue can resolve itself overtime without any intervention. We have ruled out network (e.g VPN) issues and have reproduced the issue across a number of different network configurations. We have ruled out the Keychain provider and have reproduced it across a variety of different providers and combinations of. We observed this across multiple versions of the iOS operating system and iPhone hardware including the latest hardware and iOS version.

We have received some information that with the release of iOS 18, there have been notable changes in how this API behaves, can apple team shed some light on this? on ios 17 this worked without much issues, what has changed on ios 18?