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A Summary of the WWDC25 Group Lab

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Reply to Bones/joints data issue - USD file export from Blender to RCP
Yes, AnimationLibraryComponent works fine in RCP but I need to import the same file multiple times in RCP to get all the animations (exporting them from Blender). I then need to manually add all the animations to the first file so I can build the library. Would be cool if the USD file could read the animation strips (NLA) and combining all animations in separate slots for RCP. The BOT-anist is the best example so far for this issue, thanks for guiding me to the pin system. I'm trying quite a lot but no success so far. Hopefully, I will make it work. In WWDC25 What's new in RealityKit, the presenter says the following: There is also a new entity attach method that allows you to attach one entity to the pin of another entity. This API greatly simplifies attaching meshes to the joints of an animated skeleton. Hope this will be in VisionOS 26.
Topic: Spatial Computing SubTopic: Reality Composer Pro Tags:
Sep ’25
ContactProviderManager Fails with Custom domainIdentifier, Works Only with "defaultDomain"
Has anyone encountered a situation like mine below? I’ve submitted feedback, but it seems like I’ll have to wait for a while. ContactProviderManager Fails with Custom domainIdentifier, Works Only with defaultDomain Category: Developer Tools / Frameworks Subcategory: ContactProvider Framework Reproducibility: Always iOS Version: iOS 18.0 (and later) Xcode Version: Xcode 16.0 (or later) Description: When initializing a ContactProviderManager with a custom ContactProviderDomain using any identifier other than defaultDomain, the initializer throws a ContactProviderError.domainNotRegistered error. The documentation for ContactProviderDomain (https://developer.apple.com/documentation/contactprovider/contactproviderdomain) does not provide any method to register custom identifiers, making it impossible to use ContactProviderManager with a desired custom identifier. The only successful case is when the identifier is defaultDomain. print(Error: (error)) // No error, initialization succeeds Steps to Reproduce: Create a
Topic: App & System Services SubTopic: General Tags:
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Sep ’25
dlsym cannot find symbol g_dwILResult when debugging an audio plugin
I am trying to debug the AAX version of my plugin (MIDI effect) on Pro Tools, but I am getting the following error (Mac console) when attempting to load it: dlsym cannot find symbol g_dwILResult in CFBundle etc.. I used Xcode 16.4 to build the plugin. Has anybody come across the same or a similar message? Best, Achillefs Axart Labs
Topic: Media Technologies SubTopic: Audio Tags:
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Sep ’25
Helper app is sandboxed (entitlement + runtime check), but `URLsForDirectory:` returns user home (`/Users//`) instead of container path — why?
Problem summary I have a macOS helper app that is launched from a sandboxed main app. The helper: has com.apple.security.app-sandbox = true and com.apple.security.inherit = true in its entitlements, is signed and embedded inside the main app bundle (placed next to the main executable in Contents/MacOS), reports entitlement_check = 1 (code signature contains sandbox entitlement, implemented via SecStaticCode… check), sandbox_check(getpid(), NULL, 0) returns 1 (runtime sandbox enforcement present), APP_SANDBOX_CONTAINER_ID environment variable is not present (0). Despite that, Cocoa APIs return non-container home paths: NSHomeDirectory() returns /Users/<me>/ (the real home). [[NSFileManager defaultManager] URLsForDirectory:inDomains:] and URLForDirectory:inDomain:appropriateForURL:create:error: return paths rooted at /Users/<me>/ (not under ~/Library/Containers/<app_id>/Data/...) — i.e. they look like non-sandboxed locations. However, one important exception: URLForDirectory:... for N
Topic: App & System Services SubTopic: Processes & Concurrency Tags:
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Sep ’25
macOS 26: retain cycle detected when navigation link label contains a Swift Chart
I'm running into an issue where my application will hang when switching tabs. The issue only seems to occur when I include a Swift Chart in a navigation label. The application does not hang If I replace the chart with a text field. This appears to only hang when running on macOS 26. When running on iOS (simulator) or visionOS (simulator, on-device) I do not observe a hang. The same code does not hang on macOS 15. Has any one seen this behavior? The use case is that my root view is a TabView where the first tab is a summary of events that have occurred. This summary is embedded in a NavigationStack and has a graph of events over the last week. I want the user to be able to click that graph to get additional information regarding the events (ie: a detail page or break down of events). Initially, the summary view loads fine and displays appropriately. However, when I switch to a different tab, the application will hang when I switch back to the summary view tab. In Xcode I see
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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Sep ’25
Reply to Seeking clarification on macOS URLs with security scope
It sounds like a large number of directories have been blocked - i.e. all of them. Or are these blocked target file prefixes rather than directories? Looking at my previous post, our editor mangled things a bit. Phrasing things a bit more plainly, document-scoped bookmarks can't track files in /Library (either the system or user level), /private/, or .ssh. None of those are directories I'd expect the user to be saving their data in. I could see /Library being a potential problem, however, that doesn't seem to have been much of an issue in practice since this is the first time I've ever noticed the limitation (and that was simply from looking at code). That's better than the error message it throws now. But I'm a bit confused about your object/target nomenclature. Sorry about that, I flipped my terminology mid-post. Restating things: target” -> the file you’re actually creating a bookmark to. anchor” -> the file you're attaching the document scope onto. So your anchor can be wherever you want, but the ta
Topic: App & System Services SubTopic: Core OS Tags:
Sep ’25
Reply to How is BGContinuedProcessingTask intended to be used?
I took what you said in the first response and built a simple generic queue which integrates with BGContinuedProcessingTask. I'm attaching the code in case it helps others and because it illustrates some of my lingering questions/suggestions/difficulties. In terms of the code flow/logic issues, please get your thoughts into a bug and post the bug number back here. The team is certainly interested in this kind of feedback and wants to capture it, but most API changes are going to be tied to a major release, not a software update. So, the quick summary here is that: This displays some more serious issues: The system UI often shows the indeterminate progress view... The system is very aggressive about killing background jobs... ...are quite concerning and not what the team expects. I will say that Safari can be a tricky case here as it's very easy for it to be creating much heavier load than it might seem, both because individual page load is highly variable and because it's SO easy to accumulate very h
Topic: App & System Services SubTopic: Processes & Concurrency Tags:
Sep ’25
Reply to Universal Link
Here's a summary of what was going on and how I fixed the issue (Logs are clean now!). The issue was not with the Universal Link configuration itself (the AASA file and Associated Domains were correct), but with a race condition in the SwiftUI app's lifecycle. The Problem: A Timing Issue When the Universal Link is tapped, iOS launches the app and immediately passes the URL via the .onContinueUserActivity modifier. In my original code, this modifier was on the root view in Strike_ForceApp.swift. It would parse the link and post a Notification for the UI to handle. However, at this early stage of the app launch, the destination view (FriendsAndChallengesView) that was supposed to be listening for this notification had not been initialized yet, especially if the user needed to go through a loading or login screen first. As a result, the notification was being posted before any part of the UI was ready to listen for it. The link would open the app, but the message to navigate or show an alert was lost. T
Topic: Code Signing SubTopic: Entitlements Tags:
Sep ’25
Xcode Cloud timeouts
Hey, We're crunching to get our products ready for the announcements next week but are being slowed down by Xcode Cloud. Builds are failing and are extremely slow. We're using the latest Xcode beta and latest macOS release so we can upload our builds continuously to TestFlight. We're seeing builds taking up to almost an hour, even though takes around 10-15 minutes when it doesn't fail. The errors we're seeing seem to be timeout, for example: Showing All Errors Only The step invocation hit a user timeout. The xcodebuild build invocation timed out. No activity has been detected on stdout, stderr or the result bundle in 30 minutes. Here are links to some builds which have been restarted multiple times but keep failing for reasons out of our control. Please advice on how to get unblocked. https://appstoreconnect.apple.com/teams/69a6de80-3540-47e3-e053-5b8c7c11a4d1/apps/1102236212/ci/groups/8da12ae3-b454-4810-abe8-829f1af56a54 https://appstoreconnect.apple.com/teams/69a6de80-3540-47e3-e053-5b8c7c11a4d1/ap
Topic: Developer Tools & Services SubTopic: Xcode Cloud Tags:
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Sep ’25
iTMSTransporter 4.1: --assetDescription fails with “No value present”
Until recently, I was able to upload my app with iTMSTransporter version 4.1.0 with the following command: /usr/local/itms/bin/iTMSTransporter -m upload -jwt {x.y.z} -v eXtreme -assetFile /Users/abc/Downloads/build.ipa -assetDescription /Users/abc/Downloads/AppStoreInfo.plist Starting this week, with iTMSTransporter version 4.1.0, the command fails with the following error: [2025-09-03 11:38:02 GET] <main> ERROR: No value present Package Summary: 1 package(s) were not uploaded because they had problems: /Users/abc/Downloads/build.ipa - Error Messages: No value present The same command still works when using the iTMSTransporter bundled with the Transporter app (version 4.0), so the issue appears to be specific to 4.1. Any guidance or confirmation from others experiencing this would be much appreciated.
Topic: App Store Distribution & Marketing SubTopic: App Store Connect Tags:
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Sep ’25
Reply to Seeking clarification on macOS URLs with security scope
You do have to add com.apple.security.files.bookmarks.document-scope to your entitlement file yourself, Already done. The object you're using as the bookmark anchor needs to be a file, not a directory, and must be a file you already have full read/write access to. Already done. The object you're targeting needs to be a file as well. That's an important plot point. My current app looks at folders exclusively. So that's all I tested. Document scoped bookmarks are designed to be used to track groups of user files (for example, like an Xcode project), so a small number of directories have been blocked. It sounds like a large number of directories have been blocked - i.e. all of them. Or are these blocked target file prefixes rather than directories? Ah well, such is life. I'm working an an iOS/macOS GUI version of a command-line GIS tool. I had wanted to allow the user to specify a directory to be used as a library. Power users could then use my sandboxed and Metal-powered version of the command line app
Topic: App & System Services SubTopic: Core OS Tags:
Sep ’25
Reply to Seeking clarification on macOS URLs with security scope
Yes. Because of that issue, my original design had a fairly convoluted idea for getting those bookmarks to the helper. But in this limited use case, it turned out that none of that (including bookmarks themselves) was necessary. But since you mentioned document-scoped bookmarks, I should reiterate that I tried those too. They're completely non-functional for any URL. I'm not sure what you were testing, but they absolutely do work. The main things to be aware of here are: You do have to add com.apple.security.files.bookmarks.document-scope to your entitlement file yourself, instead of adding it as a capability (r.159787652). The object you're using as the bookmark anchor needs to be a file, not a directory, and must be a file you already have full read/write access to. The object you're targeting needs to be a file as well. Document scoped bookmarks are designed to be used to track groups of user files (for example, like an Xcode project), so a small number of directories have been blocked. For exampl
Topic: App & System Services SubTopic: Core OS Tags:
Sep ’25
Reply to Sandbox Test Error
Hello - at this phase of your testing and finalization of app submission for App Store Review, you probably want to focus on TestFlight testing as documented here: https://developer.apple.com/help/app-store-connect/test-a-beta-version/testflight-overview. Be sure your testers are setup as Users in App Store Connect (the People tab under Users and Access, as separate from Sandbox) and then add them for access to your TestFlight build as part of an Internal Testing group under Apps > TestFlight in App Store Connect. Added users should get an email notification to access the build through the TestFlight app. Once you are using the app through TestFlight, then you can do further Sandbox testing as documented here: https://developer.apple.com/help/app-store-connect/test-a-beta-version/testing-subscriptions-and-in-app-purchases-in-testflight. If you are still having issues, please reply again to this thread with more details, step-by-step actions, etc. If possible, please capture a screen recording to s
Topic: App Store Distribution & Marketing SubTopic: TestFlight Tags:
Sep ’25
Reply to Network Extension App for MacOS with 3 Extensions
[quote='856490022, MasterYourSelf, /thread/798872?answerId=856490022#856490022, /profile/MasterYourSelf'] I am thinking of the following kind of project/folder structure [/quote] The Xcode structure isn’t all that important. What matters is the on-disk structure. And in the second approach the on-disk structure is exactly what you get if you create an app from the macOS > App template and then add a macOS > System Extension > Network Extension target to it, that is: Test798872.app/ Contents/ Library/ SystemExtensions/ com.example.apple-samplecode.Test798872.MyNESysex.systemextension/ … standard sysex stuff … … standard app stuff … From the on-disk structure, the only indication that your sysex hosts multiple providers is: The com.apple.developer.networking.networkextension entitlement, on both the app and the sysex, must list each provider type. The contents of the NEProviderClasses property in the sysex’s Info.plist must list the classes for each provider type. [quote='856490022, MasterYourSelf, /th
Topic: App & System Services SubTopic: Networking Tags:
Sep ’25