Overview

Problem description Since macOS Sequoia, our users have experienced issues with multicast traffic in our macOS app. Regularly, the app starts but cannot receive multicast, or multicast eventually stops mid-execution. The app sometimes asks again for Local Network permission, while it was already allowed so. Several versions of our app on a single machine are sometimes (but not always) shown as different instances in the System Settings > Privacy & Security > Local Network list. And when several instances are shown in that list, disabling one disables all of them, but it does not actually forbids the app from receiving multicast traffic. All of those issues are experienced by an increasing number of users after they update their system from macOS 14 to macOS 15 or 26, and many of them have reported networking issues during production-critical moments. We haven't been able to find the root cause of those issues, so we built a simple test app, called "FM Mac App Test", that can reproduce multicast issues. This app creates a GCDAsyncUdpSocket socket to receive multicast packets from a piece of hardware we also develop, and displays a simple UI showing if such packets are received. The app is entitled with "Custom Network Protocol", is built against x86_64 and arm64, and is archived (signed and notarized). We can share the source code if requested. Out of the many issues our main app exhibits, the test app showcases some: The app asks several times for Local Network permission, even after being allowed so previously. After allowing the app's Local Network and rebooting the machine, the System Settings > Privacy & Security > Local Network does not show the app, and the app asks again for Local Network access. The app shows a different Local Network Usage Description than in the project's plist. Several versions of the app appear as different instances in the Privacy list, and behave strangely. Toggling on or off one instance toggles the others. Only one version of the app seems affected by the setting, the other versions always seem to have access to Local Network even when the toggle is set to off. We even did see messages from different app versions in different user accounts. This seems to contradicts Apple's documentation that states user accounts have independent Privacy settings. Can you help us understand what we are missing (in terms of build settings, entitlements, proper archiving...) so our app conforms to what macOS expects for proper Local Network behavior? Related material Local Network Privacy breaks Application: this issue seemed related to ours, but the fix was to ensure different versions of the app have different UUIDs. We ensured that ourselves, to no improvement. Local Network FAQ Technote TN3179 Steps to Reproduce Test App is developed on Xcode 15.4 (15F31d) on macOS 14.5 (23F79), and runs on macOS 26.0.1 (25A362). We can share the source code if requested. On a clean install of macOS Tahoe (our test setup used macOS 26.0.1 on a Mac mini M2 8GB), we upload the app (version 5.1). We run the app, make sure the selected NIC is the proper one, and open the multicast socket. The app asks us to allow Local Network, we allow it. The alert shows a different Local Network Usage Description than the one we set in our project's plist. The app properly shows packets are received from the console on our LAN. We check the list in System Settings > Privacy & Security > Local Network, it includes our app properly allowed. We then reboot the machine. After reboot, the same list does not show the app anymore. We run the app, it asks again about Local Network access (still with incorrect Usage Description). We allow it again, but no console packet is received yet. Only after closing and reopening the socket are the console packets received. After a 2nd reboot, the System Settings > Privacy & Security > Local Network list shows correctly the app. The app seems to now run fine. We then upload an updated version of the same app (5.2), also built and notarized. The 2nd version is simulating when we send different versions of our main app to our users. The updated version has a different UUID than the 1st version. The updated version also asks for Local Network access, this time with proper Usage Description. A 3rd updated version of the app (5.3, also with unique UUID) behaves the same. The System Settings > Privacy & Security > Local Network list shows three instances of the app. We toggle off one of the app, all of them toggle off. The 1st version of the app (5.1) does not have local network access anymore, but both 2nd and 3rd versions do, while their toggle button seems off. We toggle on one of the app, all of them toggle on. All 3 versions have local network access.

Rosetta 2 Deadlock on M4 Pro January 2026 Blizzard update causes a deadlock in Rosetta 2 on M4 chips. CodeWeavers (the developer of CrossOver) has analyzed the issue and identified it as a Rosetta translation failure, not a CrossOver application-level bug. Hardware: M4 Pro Mac Book Pro System: Tahoe 26.2 Impacted Software: CrossOver 25.1.1 Diablo II: Resurrected

Hi there, I recently updated to the latest version of macOS Tahoe 26.3. Since then, Xcode is not able to resolve my Swift Package dependencies anymore. We use SSH for all our Github hosted packages. When package resolution is running, we randomly have Failed to verify SSH fingerprint on some remote package. Nothing has changed and it worked perfectly with Tahoe 26.2. The SSH have been reconfigured and known hosts have been verified. Is something changed between those 2 versions or is it a bug ?

My app (App ID: 6757516331) has been stuck in "Waiting for Review" since February 3rd. It has been over a week, and I have not received any updates yet. Any assistance would be greatly appreciated. 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!

I'll try to ask a question that makes sense this time :) . I'm using the following method on NSFileManager: (BOOL) getRelationship:(NSURLRelationship *) outRelationship ofDirectoryAtURL:(NSURL *) directoryURL toItemAtURL:(NSURL *) otherURL error:(NSError * *) error; Sets 'outRelationship' to NSURLRelationshipContains if the directory at 'directoryURL' directly or indirectly contains the item at 'otherURL', meaning 'directoryURL' is found while enumerating parent URLs starting from 'otherURL'. Sets 'outRelationship' to NSURLRelationshipSame if 'directoryURL' and 'otherURL' locate the same item, meaning they have the same NSURLFileResourceIdentifierKey value. If 'directoryURL' is not a directory, or does not contain 'otherURL' and they do not locate the same file, then sets 'outRelationship' to NSURLRelationshipOther. If an error occurs, returns NO and sets 'error'. So this method falsely returns NSURLRelationshipSame for different directories. One is empty, one is not. Really weird behavior. Two file path urls pointing to two different file paths have the same NSURLFileResourceIdentifierKey? Could it be related to https://developer.apple.com/forums/thread/813641 ? One url in the check lived at the same file path as the other url at one time (but no longer does). No symlinks or anything going on. Just plain directory urls. And YES calling -removeCachedResourceValueForKey: with NSURLFileResourceIdentifierKey causes proper result of NSURLRelationshipOther to be returned. And I'm doing the check on a background queue.

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?

Fatal Exception: NSInternalInconsistencyException Cannot remove an observer <WKWebView 0x135137800> for the key path "configuration.enforcesChildRestrictions" from <STScreenTimeConfigurationObserver 0x13c6d7460>, most likely because the value for the key "configuration" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the STScreenTimeConfigurationObserver [class.] I noticed that on iOS 26, WKWebView registers STScreenTimeConfigurationObserver, Is this an iOS 26 system issue? What should I do?

Is it possible to drive NavigationSplitView navigation with a view in sidebar (left column) that is not a List? All examples that I have seen from this year only contain List in sidebar. I ask this because I would like to have a more complex layout in sidebar (or first view on iOS) that contains a mix of elements, some of them non-interactive and not targeting navigation. Here’s what I would like to do: import SwiftUI struct Thing: Identifiable, Hashable {     let id: UUID     let name: String } struct ContentView: View {     let things: [Thing]     @State private var selectedThingId: UUID?          var body: some View {         NavigationSplitView {             ScrollView(.vertical) {                 VStack {                     ForEach(things) { thing in                         Button("Thing: \(thing.name) \( selectedThingId == thing.id ? "selected" : "" )") {                             selectedThingId = thing.id                         }                     } SomeOtherViewHere() Button("Navigate to something else") { selectedThingId = someSpecificId }                 }             }         } detail: {             // ZStack is workaround for known SDK bug             ZStack {                 if let selectedThingId {                     Text("There is a thing ID: \(selectedThingId)")                 } else {                     Text("There is no thing.")                 }             }         }     } } This actually works as expected on iPadOS and macOS, but not iOS (iPhone). Tapping changes the selection as I see in the button label, but does not push anything to navigation stack, I remain stuck at home screen. Also filed as FB10332749.

Beta testers outside the US, for our MacOS App, are being told their ID is not valid in the US Store and that they must switch to a store in their country. Yet the store switch fails Essentially beta testers outside the US cannot do testflight sandbox eCommerce for the Mac version of our app. Note that eCommerce on the Mac works for US based testers and eCommerce for the iOS/iPadOS works for testers in all territories. Many of these testers are in India, the UK and Canada. We believe that this is incorrect, that storeKit is not correctly detecting the AppStore Region for mac based testflight eCommerce. At this point we have 382 testers, most outside the US and we can only Beta Test our app with US users. Attached are images of the messages that are coming from storeKit: Here is a link to a video from a user in Canada who is demonstrating the problem (cut and paste into browser) https://youtu.be/kB818wfVld4 Here is another link to a video from a user in Canada who is demonstrating the problem (cut and paste into browser). https://youtu.be/7uAZKo8wpfU We see that there is another post with a similar problem. Similar eCommerce Problem Because eCommerce works in all territories on iOS/iPadOS but ONLY in the US for Mac we suspect that this is an error that either a DBA or a coder will need to fix. Any insights from anyone would be appreciated.

When using the new RealityKit Manipulation Component on Entities, indirect input will never translate the entity - no matter what settings are applied. Direct manipulation works as expected for both translation and rotation. Is this intended behaviour? This is different from how indirect manipulation works on Model3D. How else can we get translation from this component? visionOS 26 Beta 2 Build from macOS 26 Beta 2 and Xcode 26 Beta 2 Attached is replicable sample code, I have tried this in other projects with the same results. var body: some View { RealityView { content in // Add the initial RealityKit content if let immersiveContentEntity = try? await Entity(named: "MovieFilmReel", in: reelRCPBundle) { ManipulationComponent.configureEntity(immersiveContentEntity, allowedInputTypes: .all, collisionShapes: [ShapeResource.generateBox(width: 0.2, height: 0.2, depth: 0.2)]) immersiveContentEntity.position.y = 1 immersiveContentEntity.position.z = -0.5 var mc = ManipulationComponent() mc.releaseBehavior = .stay immersiveContentEntity.components.set(mc) content.add(immersiveContentEntity) } } }

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()     }   }   }

I have been able to train an adapter on Google's Colaboratory. I am able to start a LanguageModelSession and load it with my adapter. The problem is that after one simple prompt, the context window is 90% full. If I start the session without the adapter, the same simple prompt consumes only 1% of the context window. Has anyone encountered this? I asked Claude AI and it seems to think that my training script needs adjusting. Grok on the other hand is (wrongly, I tried) convinced that I just need to tweak some parameters of LanguageModelSession or SystemLanguageModel. Thanks for any tips.

I am attempting to load a jpeg image into a vImage_Buffer. I am just trying to get the data in an ARGB format. This code works fine in the Xcode 15 build , but fails with kvImageInvalidParameter error from vImageBuffer_InitWithCGImage in the Xcode 26 build. This code is written in ObjectiveC++. Here is a code fragment: int CDib_ARGB::Load(LPCSTR pFilename) { int rc = 0; if (NULL == m_pRaw_vImage_Buffer) { NSString *pNS_filename = [[NSString alloc]initWithUTF8String:pFilename]; NSImage *pNSImage = [[NSImage alloc] initWithContentsOfFile:pNS_filename]; if (nil == pNSImage) rc = -1; else { int width = pNSImage.size.width; int height = pNSImage.size.height; if (pNSImage.representations) { NSImageRep *imageRep; int jj; width = 0; height = 0; for (jj = 0; jj < pNSImage.representations.count; jj++) { imageRep = pNSImage.representations[jj]; if (imageRep.pixelsWide > width) width = imageRep.pixelsWide; if (imageRep.pixelsHigh > height) height = imageRep.pixelsHigh; } } NSSize imageSize = NSMakeSize(width, height); NSRect imageRect = NSMakeRect(0, 0, width, height); pNSImage.size = imageSize; CGImageRef cgImage = [pNSImage CGImageForProposedRect:&imageRect context:NULL hints:nil]; if (nil == cgImage) rc = -1; else { //Alloc and load vImage_Buffer. vImage_Buffer *pvImage_Buffer = new vImage_Buffer; if (NULL == pvImage_Buffer) rc = -1; else { vImage_CGImageFormat format; format.bitsPerComponent = 8; format.bitsPerPixel = 32; format.colorSpace = nil; format.bitmapInfo = kCGImageAlphaFirst | kCGBitmapByteOrderDefault;//ARGB8888 format.version = 0; format.decode = nil; format.renderingIntent = kCGRenderingIntentDefault; memset(pvImage_Buffer, 0, sizeof(vImage_Buffer)); long status = vImageBuffer_InitWithCGImage(pvImage_Buffer, &format, nil, cgImage, kvImagePrintDiagnosticsToConsole); if (kvImageNoError != status) { //This is where Xcode 26 sends me. delete pvImage_Buffer; rc = -1; } =========================

Hello When I tried to enroll for Apple developer program, I got message like Your enrollment could not be completed. "Your enrollment in the Apple Developer Program could not be completed at this time." And i am not able to proceed payment page anymore . Apple consultant also don’t know main problem that bother me. Is anybody solve this problem??? Is waiting most proper answer?? Thanks

Hi All, We are facing App Rejection from Apple due to this - Guidelines 5.1.1(i) - Legal - Privacy - Data Collection and 5.1.2(i) - Legal - Privacy - Data Use Issue Description The app appears to share the user’s personal data with a third-party AI service but the app does not clearly explain what data is sent and identify who the data is sent to before sharing the data. Apps may only use, transmit, or share personal data after they meet all of the following requirements: Disclose what data will be sent Specify who the data is sent to Obtain the user’s permission before sending data Identify in the privacy policy what data the app collects, how it collects that data, all uses of that data, and confirm any third party the app shares data with provides the same or equal protection Next Steps If the app sends user data to a third-party AI service, revise the app to explain what data is sent and identify who the data is sent to before sharing personal data with a third-party AI service. If it does not already, the app’s privacy policy must also identify what data the app collects, how it collects that data, and all uses of that data, including if it is shared with a third-party AI service. If the app does not send user data to a third-party AI service or does not include a third-party AI service, reply to this rejection to confirm and add this information to the App Review Information section of App Store Connect. We have updated on privacy policy and ATT as well as Nutrition Labels and we have added a consent screen for explicitly taking the user consent for AI Services. However we are still seeing the rejection. Has some else faced a similar issue and what are the steps they followed for this.

Hello team, I am trying to find out a way to block urls in the chrome browser if it is found in local blocked list cache. I found URL Filter Network very much suitable for my requirement. But I see at multiple places that this solution is only for Enterprise level or MDM or supervised device. So can I run this for normal user ? as my targeting audience would be bank users. One more thing how can I test this in development environment if we need supervised devices and do we need special entitlement ? When trying to run sample project in the simulator then getting below error

Reference: FB21797091 / Related to thread 807695 Hello, I have already submitted a report regarding this issue via Feedback Assistant (FB21797091), but I would like to share the technical details here to seek further insights or potential workarounds. We are experiencing a technical regression where Universal Links and Shared Web Credentials fail to resolve for Internationalized Domain Names (IDN) specifically on iOS 16 and later. This issue appears to be identical to the one discussed in thread 807695 (https://developer.apple.com/forums/thread/807695). Technical Contrast: What works vs. What fails On the exact same app build and iOS 16+ devices, we observe a clear distinction: Standard ASCII Domain (onelink.me): Works perfectly. (Proves App ID and Entitlements are correct) Internal Development Domain (Standard ASCII): Works perfectly. (Proves our server-side AASA hosting and HTTPS configuration are correct) Japanese IDN Domain (xn--[punycode].com): Fails completely. (Status: "unspecified") Note: This IDN setup was last confirmed to work correctly on iOS 15 in April 2025. Currently, we are unable to install the app on iOS 15 devices for live comparison, but the regression starting from iOS 16 is consistent. This "Triple Proof" clearly isolates the issue: the failure is strictly tied to the swcd daemon's handling of IDN/Punycode domains. Validation & Diagnostics: Validation: Our Punycode domain passes all technical checks on the http://Branch.io AASA Validator (Valid HTTPS, valid JSON structure, and Content-Type: application/json). sysdiagnose: Running swcutil on affected iOS 16+ devices shows the status as "unspecified" for the IDN domain. Symptoms: Universal Links consistently open in Safari instead of the app, the Smart App Banner is not displayed, and Shared Web Credentials for AutoFill do not function. Request for Resolution: We request a fix for this regression in the swcd daemon. If this behavior is a specification for security reasons, please provide developers with a supported method or workaround to ensure IDN domains function correctly. We have sysdiagnose logs available for further investigation. Thank you.

Hello, I'm experiencing a persistent issue where all my notarization submissions remain stuck in "In Progress" indefinitely. This has been happening for the past several days, affecting multiple submissions. Environment: macOS 26.2 (Build 25C56) Using xcrun notarytool submit for submissions Team ID: M3FN25UQK2 Timeline of the issue: Starting from January 2nd, 2026, my submissions began getting stuck in "In Progress" As of January 6th, I have 6+ submissions that have been "In Progress" for 24-72+ hours Prior to this, notarization was working normally (I have multiple "Accepted" submissions from January 1st) What I've tried: Verified my Developer ID Application certificate is valid and properly installed Checked Apple Developer System Status page (shows "Operational") Verified code signatures using codesign -vvv --deep --strict Contacted Apple Developer Support (no response yet) Checked my Apple Developer account for any pending agreements or warnings (none found) Is there any known issue affecting notarization processing, or could my Team ID be rate-limited/flagged? Any guidance on how to resolve this would be greatly appreciated. Thank you!

Hey all, I recently updated to Xcode 26.2 and I'm having the hardest time trying to download the corresponding iOS simulator. I installed Xcode from developer downloads and the app did not come loaded with an iOS simulator. When trying to download from Components in Settings, I only get the following message: Download failed due to a bad URL. (Catalog download for com.apple.MobileAsset.iOSSimulatorRuntime) Domain: com.apple.MobileAssetError.Download Code: 49 User Info: { checkConfiguration = 1; } I also tried downloading via Terminal but also get a download failed message. I am on the latest macOS and have over 600 GB of disk space available. In previous versions, I was able to download the iOS simulator directly from Developer Downloads, but anything after 26 is not there. Any suggestions?