Overview

I've been working on an app. It uses iCloud syncing. 48 hours ago everything was working 100%. Make a change on the iPhone it immediately changed on the Mac. Change on the Mac, it immediately changed on the iPhone. I didn't work on it yesterday. I updated to iOS26.4 on the iPhone and 26.4 on the Mac yesterday instead. Today, I pull up the project again. I made NO changes to the code or settings. Make a change on the iPhone it immediately updates on the Mac. Make a change on the Mac, nothing happens on the iPhone. I've waited an hour, and the change never happens. If you leave the iPhone app, then return, it updates as it should. It appears that iCloud's silent notification is to being received by the iPhone. Anyone else having the issue? Is there something new with iOS 26.4 that needs to be adjusted to get this to work? Again, works flawlessly with the Mac, just not with the iPhone.

I'm building a freediving app for Apple Watch Ultra using the shallow depth entitlement (com.apple.developer.submerged-shallow-depth-and-pressure). My app uses WKExtendedRuntimeSession with the underwater-depth background mode, and it works correctly — the session starts, Water Lock activates automatically, and Crown hold water ejection ends the session as expected. However, the app does not appear in Settings > General > Auto-Launch > When Submerged on the watch. Other third-party apps (including one that hasn't been updated in ~2 years and presumably only has the shallow entitlement) do appear in this list. My configuration: WKBackgroundModes: ["underwater-depth", "workout-processing"] WKSupportsAutomaticDepthLaunch: true (Boolean, in watch app Info.plist) Entitlement verified in both the signed binary and provisioning profile watchOS 26.3, Apple Watch Ultra 2 Tested with: development build, TestFlight, and direct Xcode deploy. Watch restarted after each. The app does not appear in any case. The documentation at https://developer.apple.com/documentation/coremotion/accessing-submersion-data states: "Adding the underwater-depth Background Mode capability also adds your app to the list of apps that the system can autolaunch when the wearer submerges the watch." Does auto-depth-launch require the full depth entitlement (com.apple.developer.submerged-depth-and-pressure), or should the shallow entitlement be sufficient? Is there an additional step required for the app to appear in the When Submerged list? Any guidance appreciated.

Upgraded to Tahoe 26.4 and Xcode 26.4 and realized Xcode is missing the documentation for Foundation. Occasionally, if other (not yet missing) documentation references a Foundation entity, such as a type, clicking on it may open in a web browser pointing to the externally hosted Apple documentation. Anyone else experiencing this or have a workaround (perhaps the documentation files are on disk but were somehow lost / disconnected from the Xcode doc browser)? I checked the release notes for 26.4 and for 26.3 but did not find a mention of anything like that. Filed an issue with Apple, please do too if you are affected so hopefully it will see some love and lead to restoring the documentation. Edited: found some possibly related files in my ~/Library and the newer version v302 (26.4 related, I think, is considerably smaller): du -sh ~/Library/Developer/Xcode/DocumentationCache/* | awk -F/ '{print $NF "\t" $1}' v296 1.0G v302 507M

I've been able to run this sample project with the PIRServer. But the urls are still not blocked. https://developer.apple.com/documentation/networkextension/filtering-traffic-by-url https://github.com/apple/pir-service-example I got this on the log Received filter status change: <FilterStatus: 'running'>

Hi, We are trying to integrate Metric Kit into our MacOS Application. Our application is a background process. We are interested in getting CPU and Memory metrics for our process. MXMetricPayload is the one we are looking at. We tried to integrate metric Kit and left the background app for 24 hours, we did not get any callback. So, does metric kit work for background app in MacOS? Also does it for Network Extension?

Does the App Review process have access to Apple-Hosted Asset Packs during review? My app uses Asset Packs to offer a library of data to the end-user (with a workaround, if unavailable), but I am frequently seeing the workaround screen in App Review with errors I haven't seen elsewhere. The latest error I encountered (via the App Review team's feedback) was: "A server with the specified hostname could not be found." thrown from (to my belief) AssetPackManager.shared.ensureLocalAvailability. This is unexpected to me, as both this code as well as the asset packs have already been released and are working reliably in production. Has anyone else experienced these issues?

I am facing an intermittent problem where iPhones are failing to pair/connect with Xcode under Xcode -> Windows -> Devices and Simulators. This happens when more than one web content filters are present, for instance, I have my web content filter (FilterSockets true, FilterGrade Firewall) and there is also Sentinel One web content filter with same configuration. Note: We are not blocking any flow from remoted / remotepairingd / core device service / MDRemoteServiceSupport etc processes. But they do get paused and resumed at times for our internal traffic verification logic. So, we are trying to understand what impact our content filter may be having on this iPhone Pairing?? If we stop either one of the filters the problem goes away. I have tracked the network traffic to the phone, and it seems to be using a ethernet interface (en5/en10) over the USB-C cable. I can see endpoints like this: localEndpoint = fe80::7:afff:fea1:edb8%en5.54442 remoteEndpoint = fe80::7:afff:fea1:ed47%en5.49813 I also see remoted process has the below ports open : sudo lsof -nP -iTCP -iUDP | grep remoted remoted 376 root 4u IPv6 0xce4a89bddba37bce 0t0 TCP [fe80:15::7:afff:fea1:edb8]:57395->[fe80:15::7:afff:fea1:ed47]:58783 (ESTABLISHED) remoted 376 root 6u IPv6 0xf20811f6922613c7 0t0 TCP [fe80:15::7:afff:fea1:edb8]:57396 (LISTEN) remoted 376 root 7u IPv6 0x2c393a52251fcc56 0t0 TCP [fe80:15::7:afff:fea1:edb8]:57397 (LISTEN) remoted 376 root 8u IPv6 0xcb9c311b0ec1d6a0 0t0 TCP [fd6e:8a96:a57d::2]:57398 (LISTEN) remoted 376 root 9u IPv6 0xc582859e0623fe4e 0t0 TCP [fd6e:8a96:a57d::2]:57399 (LISTEN) remoted 376 root 10u IPv6 0x2f7d9cee24a44c5b 0t0 TCP [fd6e:8a96:a57d::2]:57400->[fd6e:8a96:a57d::1]:60448 (ESTABLISHED) remoted 376 root 11u IPv6 0xbdb7003643659de 0t0 TCP [fd07:2e7e:2a83::2]:57419 (LISTEN) remoted 376 root 12u IPv6 0x569a5b649ff8f957 0t0 TCP [fd07:2e7e:2a83::2]:57420 (LISTEN) remoted 376 root 13u IPv6 0xa034657978a7da29 0t0 TCP [fd07:2e7e:2a83::2]:57421->[fd07:2e7e:2a83::1]:61729 (ESTABLISHED) But due to the dynamic nature of port and IPs used we are not able to decide on an effective early bypass NEFilterRule. We don't want to use a very broad bypass criteria like all link local IPs etc. Any help will be greatly appreciated.

After updating to Xcode 26.4 the pasteboard sharing feature in the simulators doesn't work.

Area: CoreML / Machine Learning Describe the issue: On iOS 26.4, calling MLModel(contentsOf:configuration:) to load an .mlpackage model hangs indefinitely and eventually kills the app via watchdog. The same model loads and runs inference successfully in under 1 second on iOS 26.3.1. The hang occurs inside eort_eo_compiler_compile_from_ir_program (espresso) during on-device AOT recompilation triggered by MLE5ProgramLibraryOnDeviceAOTCompilationImpl createProgramLibraryHandleWithRespecialization:error:. A C++ exception (__cxa_throw) is thrown inside libBNNS.dylib during the exception unwind, which then hangs inside __cxxabiv1::dyn_cast_slow and __class_type_info::search_below_dst. Swift's try/catch does not catch this — the exception originates in C++ and the process hangs rather than terminating cleanly. Setting config.computeUnits = .cpuOnly does not resolve the issue. MLE5ProgramLibrary initialises as shared infrastructure regardless of compute units. Steps to reproduce: Create an app with an .mlpackage CoreML model using the MLE5/espresso backend Call MLModel(contentsOf: modelURL, configuration: config) at runtime Run on a device on iOS 26.3.1 — loads successfully in <1 second Update device to iOS 26.4 — hangs indefinitely, app killed by watchdog after 60–745 seconds Expected behaviour: Model loads successfully, or throws a catchable Swift error on failure. Actual behaviour: Process hangs in MLE5ProgramLibrary.lazyInitQueue. App killed by watchdog. No Swift error thrown. Full stack trace at point of hang: Thread 1 Queue: com.apple.coreml.MLE5ProgramLibrary.lazyInitQueue (serial) frame 0: __cxxabiv1::__class_type_info::search_below_dst libc++abi.dylib frame 1: __cxxabiv1::(anonymous namespace)::dyn_cast_slow libc++abi.dylib frame 2: ___lldb_unnamed_symbol_23ab44dd4 libBNNS.dylib frame 23: eort_eo_compiler_compile_from_ir_program espresso frame 24: -[MLE5ProgramLibraryOnDeviceAOTCompilationImpl createProgramLibraryHandleWithRespecialization:error:] CoreML frame 25: -[MLE5ProgramLibrary _programLibraryHandleWithForceRespecialization:error:] CoreML frame 26: __44-[MLE5ProgramLibrary prepareAndReturnError:]_block_invoke CoreML frame 27: _dispatch_client_callout libdispatch.dylib frame 28: _dispatch_lane_barrier_sync_invoke_and_complete libdispatch.dylib frame 29: -[MLE5ProgramLibrary prepareAndReturnError:] CoreML frame 30: -[MLE5Engine initWithContainer:configuration:error:] CoreML frame 31: +[MLE5Engine loadModelFromCompiledArchive:modelVersionInfo:compilerVersionInfo:configuration:error:] CoreML frame 32: +[MLLoader _loadModelWithClass:fromArchive:modelVersionInfo:compilerVersionInfo:configuration:error:] CoreML frame 45: +[MLModel modelWithContentsOfURL:configuration:error:] CoreML frame 46: @nonobjc MLModel.__allocating_init(contentsOf:configuration:) GKPersonalV2 frame 47: MDNA_GaitEncoder_v1_3.__allocating_init(contentsOf:configuration:) frame 48: MDNA_GaitEncoder_v1_3.__allocating_init(configuration:) frame 50: GaitModelInference.loadModel() frame 51: GaitModelInference.init() iOS version: Reproduced on iOS 26.4. Works correctly on iOS 26.3.1. Xcode version: 26.2 Device: iPhone (model used in testing) Model format: .mlpackage

We have an application that capture audio and video. App captures audio PCM on internal or external microphone and displays audio level on the screen. App was working fine for many years but after iOS 26.4 upgrade, averagePowerLevel and peakHoldLevel are stuck to -120 values. Any suggestion?

I’m encountering a persistent issue with my Network Extension (specifically NEFilterDataProvider) and would really appreciate any insights. The extension generally works as expected, but after some time — especially after sleep/wake cycles or network changes — a global network outage occurs. During this state, no network traffic works: pings fail, browsers can’t load pages, etc. As soon as I stop the extension (by disabling it in System Preferences), the network immediately recovers. If I re-enable it, the outage returns instantly. I’ve also noticed that once this happens, the extension stops receiving callbacks like handleNewFlow(), and reinstalling the app or restarting the extension doesn’t help. The only thing that resolves the issue is rebooting the system. After reboot, the extension works fine again — until the problem reoccurs later. I asked AI about this behavior, and it suggested the possibility that the kernel might have marked the extension as untrusted, causing the system to intentionally block all network traffic as a safety mechanism. Has anyone experienced similar behavior with NEFilterDataProvider? Could there be a way to detect or prevent this state without rebooting? Is there any logging or diagnostic data I should collect when it happens again? Any guidance or pointers would be greatly appreciated. Thanks in advance!

Hi Apple Community, We are using Automted Device Enrollment to Enroll macOS Devices and we used to Create AutoAdmin, PrimaryAccount using the Command Account Configuration . As a Part of Primary Account Creation while testing we see that BootStrap Token is Escrowed to MDM, and SecureToken is Created to Primary Account. The Primary Account user will enable FileVault as part of our process. As Tested internally, we seen that SecureToken is escrowed to AutoAdmin only when BootStrapToken is escrowed to MDM By device and AutoAdmin logs in then. That too After FileVault Unlock Since we Sendout the Laptop to users to setup themselves there are no chances of AutoAdmin Login to occur. And it defeats the purpose of having the AutoAdmin Account in emergency situation to login into it from Login Window. Can someone confirm if this behavior is expected and what are the expectation and recommendations from Apple on when to use AutoAdmin Account. Is there any other ways to use AutoAdmin directly from LoginWindow Before To FileVault Disk Unlock

By analysis the log, seems the following 3 calls has been ended by system callkit (Not mainly trigger the end call): @apple Do you have similar report that the iOS CallKit End the call withtour user action? Device info: iPhone18,1（iPhone 16 Pro） iOS 26.2 RCAppMobile/25.4.30.995 CTRadioAccessTechnologyNR（5G NR）

Hi, We're having problems starting an Ad Hoc ipa on an iPad with iOS 12.7.7 and 12.7.8, probably iOS 12 in general. The iPad's UUID is added to the certificate. And we don't have problems with iOS versions > iOS 12. Here is the anonymized Console Log: default 09:05:12.088994+0100 SpringBoard immediate edge swipe: failed default 09:05:12.095189+0100 SpringBoard Icon touch began: <private> default 09:05:12.096204+0100 SpringBoard Found a reasonable launch image for <private>, not pre-warming SplashBoard. Load image into the snapshot instance. default 09:05:12.117737+0100 powerd Activity changes from 0x2 to 0x1. UseActiveState:1 default 09:05:12.118572+0100 powerd hidActive:1 displayOff:0 assertionActivityValid:0 now:0xcb6 hid_ts:0xcb6 assertion_ts:0x0 default 09:05:12.145354+0100 backboardd [HID] [MT] dispatchEvent Dispatching event with 1 children, _eventMask=0x23 _childEventMask=0x3 Cancel=0 Touching=0 inRange=0 default 09:05:12.152820+0100 SpringBoard Icon tapped: <private> default 09:05:12.158236+0100 dasd Trigger: <private> is now [1] default 09:05:12.159538+0100 dasd Don't have <private> for type 1 default 09:05:12.170128+0100 trustd cert[0]: SubjectCommonName =(leaf)[]> 0 default 09:05:12.170407+0100 trustd cert[0]: LeafMarkerOid =(leaf)[]> 0 default 09:05:12.182388+0100 trustd OCSPSingleResponse: nextUpdate 0.54 days ago default 09:05:12.186084+0100 trustd OCSPSingleResponse: nextUpdate 0.62 days ago default 09:05:12.187067+0100 SpringBoard Trust evaluate failure: [leaf IssuerCommonName LeafMarkerOid SubjectCommonName] default 09:05:12.238604+0100 trustd Task <TASK_UUID_REDACTED_1>.<1> resuming, QOS(0x19) default 09:05:12.240650+0100 trustd TIC TCP Conn Start [12:0xADDR_REDACTED] default 09:05:12.241136+0100 trustd [C12 Hostname#HASH_REDACTED:80 tcp, pid: PID_REDACTED, url hash: HASH_REDACTED] start default 09:05:12.245884+0100 trustd TIC TCP Conn Start [13:0xADDR_REDACTED] default 09:05:12.246361+0100 trustd [C13 Hostname#HASH_REDACTED:80 tcp, pid: PID_REDACTED, url hash: HASH_REDACTED] start default 09:05:12.256520+0100 trustd nw_connection_report_state_with_handler_locked [C12] reporting state failed error Network is down error 09:05:12.256978+0100 trustd TIC TCP Conn Failed [12:0xADDR_REDACTED]: 1:50 Err(50) error 09:05:12.262697+0100 trustd Task <TASK_UUID_REDACTED_1>.<1> HTTP load failed (error code: -1009 [1:50]) error 09:05:12.271646+0100 trustd Task <TASK_UUID_REDACTED_1>.<1> load failed with error Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." default 09:05:12.271898+0100 trustd Failed to download ocsp response http://ocsp.apple.com/ocsp03-wwdrg311/... with error Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." default 09:05:12.280643+0100 SpringBoard Activating <private> from icon default 09:05:12.281399+0100 CommCenter #I CTServerConnection from pid PID_REDACTED has closed (conn=0xADDR_REDACTED) default 09:05:12.513629+0100 SpringBoard Bootstrapping com.example.myapp with intent foreground-interactive default 09:05:12.514084+0100 assertiond Submitting new job for "com.example.myapp" on behalf of <BKProcess: 0xADDR_REDACTED; SpringBoard; com.apple.springboard; pid: PID_REDACTED; ...> default 09:05:12.514909+0100 assertiond Submitted job with label: UIKitApplication:com.example.myapp[REDACTED][REDACTED] error 09:05:12.516769+0100 SpringBoard [com.example.myapp] Bootstrap failed with error: <NSError: 0xADDR_REDACTED; domain: BKSProcessErrorDomain; code: 1 (bootstrap-failed); reason: "Failed to start job"> error 09:05:12.516935+0100 SpringBoard Bootstrapping failed for <FBApplicationProcess: 0xADDR_REDACTED; com.example.myapp; pid: -1> with error: Error Domain=BKSProcessErrorDomain Code=1 "Unable to bootstrap process with bundleID com.example.myapp" default 09:05:12.517589+0100 SpringBoard <FBApplicationProcess: 0xADDR_REDACTED; com.example.myapp; pid: -1> exited. default 09:05:12.542638+0100 SpringBoard Application process state changed for com.example.myapp: <SBApplicationProcessState: 0xADDR_REDACTED; pid: -1; taskState: Not Running; visibility: Unknown> default 09:05:13.072994+0100 SpringBoard Front display did change: <SBApplication: 0xADDR_REDACTED; com.example.myapp> Is there any know problem with running Ad Hoc ipas on iOS 12? Thanks Christian

Just installed the new Xcode 26.4 RC build (17E192) after happily using 26.3 for a few months. I'm noticing some immediate regressions in the Intelligence features: Frequent losing of OAuth token (Claude Agent). This had previously been fixed and now is back. Agent "Thinking" is constrained to thought bubble windows, which are (a) too small to read, (b) not scrollable when thinking goes beyond a few paragraphs. Yes they are tappable when thinking is finished, but this doesn't help. Due to (2), in deep thinking, it's impossible to follow progress beyond the visible window, so impossible to know if the agent is going off the rails. I'm noticing just more general slowness to complete tasks. Not just complete them -- it seems like it takes longer to START tasks, which is really weird. It sits there thinking for longer. Same project, same model as before. Every time you tap "New Chat" it presents both Claude and Codex choices, even if you're only signed into one. This turned a simple single tap into now a required two taps. Overall this feels like a frustrating setback after a very positive user experience in 26.3.

We are encountering an issue in an iOS application where functionality works correctly in Debug builds but fails in Release builds distributed via TestFlight. Details Debug (No Optimization -Onone): Works correctly Release (Optimize for Speed -O): Fails Release with -Onone: Works, but app size nearly doubles Context The issue is related to integration with the Microsoft ONNX runtime library. It appears that the Swift/Clang compiler is aggressively optimizing certain parts of the code in Release builds, possibly removing or altering required logic. Observations The issue started appearing with recent iOS/Xcode updates. No code changes affecting this logic were made recently. Behavior strongly suggests optimization-related side effects. Questions Are there known issues with aggressive optimization (-O) affecting third-party libraries? Are there recommended flags to selectively disable optimization for specific modules or functions? Any tools or diagnostics to identify what is being optimized out? Temporary Workaround Using -Onone resolves the issue but is not viable for production due to significant increase in app size. Any guidance would be greatly appreciated.

I need to launch ASWebAuthenticationSession from single sign on extension, but its not launching it might issue with anchoring window, I have create custom windo and passing it in presentanchor(for session) function, custom window is launching but ASWebAuthenticationSession browser is not launching Note - flow is like this Apple PSSO register window lauched OIDC login will happen via ASWebAuthenticationSession to get accesstoken which will use in device registration but ASWebAuthenticationSession is not launching, I am using custom scheme as redirect URI iskeywindow for custom window is always false what is right approach to achieve the goal

Are there some requirements to use Notification Content Extensions other than including the target to my iOS app? I have done it, configured it to match a certain category of notifications, but my custom interface doesn’t show up. is there anything I need to configure on my main app? Is that anything that should be changed there, such as disabking its botifications handling? is there any requirement concerning the payload? I tried to disable time sensitive and content-available notifications, but it didn’t help.

Hello dear Apple Platform Engineers, I'm working on an iOS App that connects to a Bluetooth Low Energy Peripheral in the foreground. Whenever the App moves into Background, we want to continue syncing data & therefore implemented State Restoration to be informed about Discovery, Connect, Disconnect or Characteristic changes in the Background in order to wake the App up whenever it was "Terminated due to memory issue". I consulted https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/CoreBluetoothBackgroundProcessingForIOSApps/PerformingTasksWhileYourAppIsInTheBackground.html#//apple_ref/doc/uid/TP40013257-CH7-SW1 for this & assigned: CBCentralManagerOptionRestoreIdentifierKey Reinstantiate the dedicated CentralManager & implemented the centralManager(_ central: CBCentralManager, willRestoreState dict: [String : Any]) Delegate Additionally, I assigned the following keys on connect(_ peripheral: CBPeripheral, options: [String : Any]? = nil) CBConnectPeripheralOptionNotifyOnConnectionKey CBConnectPeripheralOptionNotifyOnDisconnectionKey CBConnectPeripheralOptionNotifyOnNotificationKey However, from my experience the App gets woken up, but neither the willRestoreState nor the didDiscover, didConnect or didDisconnectPeripheral is called even though launchOptions?[UIApplication.LaunchOptionsKey.bluetoothCentrals] as? [String] is not empty. What might I be missing when trying to make this approach work? Thanks a lot for any insights & support!

Hello All, I have a app which has a WKWebview loading some code from a remote origin - https://my-company.example.com When WKWebview loads remote origin, that page does load some of the sub-resources from in-app localhost server (GCDWebserver), i.e. reach out to a loopback based in-app GCDWebserver, now to provide a secure context I had an existing setup with self signed cert, CORS and everything needed for https on localhost. And the sub-resources used to load fine from https localhost till 26.4 Starting with iOS 26.4 it started breaking with TLSv1_ALERT_UNKNOWN_CA Is there any known guidance for this? Technically as per w3c spec, localhost is considered secure context by default right? and no special things need to be done. But ios/Webkit seem to be different in this regard. Is this a known issue, and is there any mitigation here? I'll try to provide a sample app soon if possible.