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A Summary of the WWDC25 Group Lab

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iOS 26: Navigation bar unexpectedly switches to Light appearance during navigation in Dark Mode
Summary On iOS 26, the navigation bar unexpectedly switches to a Light appearance during/after a view transition while the device/app is in Dark Mode. This seems correlated with applying listStyle(.plain) to a List. Removing .plain prevents the issue, but my app’s layout requires it. Sample code: import SwiftUI @main struct iOS26NavigationTitleSampleApp: App { var body: some Scene { WindowGroup { NavigationStack { ContentView() .navigationTitle(Root) .navigationBarTitleDisplayMode(.inline) } } } } struct ContentView: View { var body: some View { VStack { NavigationLink { ListView() } label: { VStack { Image(systemName: globe) .imageScale(.large) .foregroundStyle(.tint) Text(Hello, world!) } } } .padding() .toolbar { ToolbarItemGroup(placement: .navigation) { Button(Test) { } Button(Test2) { } } } } } struct ListView: View { var items: [Int] = Array(0..<100) var body: some View { List { ForEach(items.indices, id: .self) { idx in cell(items[idx]) } } .listStyle(.plain) .toolbar { ToolbarItemGroup(pl
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Oct ’25
Will Icon Composer support development of tvOS and visionOS icons?
In the beta of Icon Composer, I see macOS, iOS, and watchOS icons, but there is nothing about visionOS and tvOS. Those icons are particularly hard and it would be great if this app worked for developing icons for all Apple platforms. I tried asking this in a WWDC group lab, but they didn't get to it and suggested posting to the forum.
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Oct ’25
Reply to Avoid hallucinations and information from trainning data
Thanks a lot for your super-fast advice! My results have increased quality. I only need a bit more of information about when is a best practique incorporate a description for a Guided attribute. @Generable struct SearchSuggestions { @Guide(description: A list of suggested search terms, .count(4)) var searchTerms: [String] } Listening the WWDC25 session Deep dive into Foundation Generation Models from min 9:00 to 9:15: Multiline Foundation Models will even automatically include details about your Generable type in the prompt, in a specific format that the model has been trained on. You don’t have to tell it about what fields your Generable type has BlockQuote I interpret that with an auto-descriptive name to the attribute like SearchSuggestions write a description is overwork because the model already may infer what must be the content. Am I right? If my state is true, go deeper and learn what must be set in the description. Some examples would be the best to set clearly best practiques 😀
Oct ’25
Reply to Xcode Signing Fails: Provisioning Profile "doesn't match" com.apple.developer.driverkit.userclient-access entitlement
Hi Kevin, Thank you for the detailed response. Here is a summary of our tests based on the solutions you proposed: Regarding the userclient-access Entitlement: We discovered a human error in our initial entitlement request (we had entered the wrong Bundle ID). We have submitted a new, corrected request with the proper DEXT Bundle ID and are currently awaiting its approval. Regarding the Temporary Solutions: To continue development while waiting, we tried your other suggestions, but are still blocked. App Sandbox: We confirm that com.apple.security.app-sandbox is set to false in our app's entitlements. This alone did not solve the issue. IOKit User Client Class Temporary Exception: We implemented your third suggestion precisely. Our app's .entitlements file for this test was configured exactly as follows: com.apple.security.temporary-exception.iokit-user-client-class IOUserUserClient com.apple.security.app-sandbox com.apple.developer.system-extension.install com.apple.security.get-task-allow
Topic: App & System Services SubTopic: Drivers Tags:
Oct ’25
Certification problem/Resource Fork alignment
📦 Package Contents This is a complete macOS/iOS port of REFIXXY with all Windows dependencies removed and replaced with macOS equivalents. What's Included ✅ Complete Python source code (macOS-compatible) ✅ macOS packaging scripts (py2app, DMG creation) ✅ Info.plist for app bundle ✅ Code signing scripts for Apple Developer ✅ Apple App Store submission guide ✅ Installation and testing instructions What You Need to Add ❌ FFmpeg binaries for macOS (download instructions below) ❌ Apple Developer Certificate (for code signing) ❌ Test on your Mac (cannot test on Windows) 🚀 Quick Start on Your Mac Step 1: Copy to Your Mac Copy this entire folder to your Mac via OneDrive Location: ~/Documents/REFIXXY-macOS/ Step 2: Install Dependencies # Install Homebrew (if not already installed) /bin/bash -c $(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh) # Install Python 3.11+ brew install python@3.11 # Install FFmpeg brew install ffmpeg # Install Python dependencies cd ~/Documents/REFIXXY-macOS p
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Oct ’25
Reply to App Group Not working as intended after updating to macOS 15 beta.
May seem like a dumb question but I'm somewhat overwhelmed by the amount of information and all the terms and conditions as it relates to this topic. There are several threads about cross platform issues, etc. as it relates to app groups but that is not my situation. Not too long ago I asked a similar question about a different app (not new but an update) and I just stuck with the group prefix on that one but I'd like to know what the recommendation is for a new Mac app. So I have this simple situation: I have a new Mac app. Two versions: Mac App Store (sandboxed) Non-Mac App Store (not sandboxed). They both use XPC service embedded in the app. XPC service + main app need an app group. Both non-MAS and MAS use app groups with their own XPC services (not with each other) I always used teamIdprefix.groupidentifier. So I configured and registered the group identifier for the outside the Mac App Store version because Xcode prompted me to. I'm using group. pref
Topic: Privacy & Security SubTopic: General Tags:
Oct ’25
Reply to Xcode Signing Fails: Provisioning Profile "doesn't match" com.apple.developer.driverkit.userclient-access entitlement
Hi Smith, Thank you so much for your excellent suggestions. I've followed your advice and have some definitive results to share. Regarding your first suggestion (Inspecting the Provisioning Profile): You were absolutely right. I inspected the latest Xcode-managed .provisionprofile for my app (com.accusys.Acxxx.app) after a complete cleanup. The profile does not contain the correct value for the userclient-access entitlement. Here is what the profile's Entitlements dictionary contains: com.apple.developer.driverkit.userclient-access: com.accusys.Acxxx.app com.apple.application-identifier: K3TDMD9Y6B.com.accusys.Acxxx.app keychain-access-groups: K3TDMD9Y6B.* As you can see, the value for userclient-access is incorrectly set to the app's own bundle ID, not the DEXT's (com.accusys.Acxxx.driver). Regarding your second suggestion (Using allow-any-userclient-access): I also tried the alternative strategy you proposed, which is a setup we had already been testing. Here is the configuration: App Entitlements
Topic: App & System Services SubTopic: Drivers Tags:
Oct ’25
Inquiry: Inconsistent VPP UpdateBehavior with DDM (auto-update timing + manual-update gating)
Hi there, We’re testing Declarative Device Management (DDM) for VPP app management and followed the latest declaration template here: https://github.com/apple/device-management/blob/release/declarative/declarations/configurations/app.managed.yaml Our goal is to enable VPP auto-updates via the declaration. The payload we’re using looks like this: AppStoreID: 1231325957, InstallBehavior: {Install: Required, License: {Assignment: Device}}, UpdateBehavior: {AutomaticAppUpdates: AlwaysOn} } What we’re seeing Device A (no Apple ID signed into App Store): User can manually update the VPP app with the above declaration in place. ( The same user cannot update the app if UpdateBehavior is not in the declaration payload. Device B (Apple ID signed into App Store, and the same Apple ID doesn't have the above app purchased): User cannot manually update the same VPP app. The App Store shows the error seen when UpdateBehavior is absent: “ cannot be updated because it was refunded or purchased with a different Apple Account.”
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Oct ’25
SSO Extension Fails XPC Connection to System Daemon (mach-lookup exception used)
Hello, I'm running into an issue with a complex macOS application (non-AppStore) structure involving an unsandboxed system daemon and a sandboxed SSO Extension attempting to communicate via XPC Mach service. The macOS app is composed of three main components: Main App: unsandboxed, standard macOS application. System Daemon: unsandboxed executable installed with a .plist to /Library/LaunchDaemons/ and loaded by launchd. It exposes an XPC Mach Service. SSO Extension: a sandboxed Authentication Services Extension (ASAuthorizationProviderExtension). Main App to System Daemon communication works perfectly. The unsandboxed main app can successfully create and use an XPC connection to the System Daemon's Mach service. But SSO Extension cannot establish an XPC connection to the System Daemon's Mach service, despite using the recommended temporary exception entitlement. I have added the following entitlement to the SSO Extension's entitlements file: com.apple.security.temporary-exception.mach-lookup.global-name my.xp
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Oct ’25
[Regression] Core Location underground positioning inaccurate on iOS 26.1 beta (23B5044i)
Summary While parallel testing Core Location on the new iOS 26.1 beta (23B5044i), I observed what I believe to be a regression of the issue described here: https://developer.apple.com/forums/thread/779192 Specifically, user positioning underground subway stations is noticeably inaccurate on the beta, whereas the same scenarios remain accurate on the unupgraded device below. I work with the MTA (New York City) and work with the OP of that thread. Happy to provide additional testing or details if helpful. Please let me know what else you need. Test Info Riding NYCT from Wall St to 34th St Penn Station on the 2 train carrying two iphones Recording: https://limewire.com/d/dpTWi#pDC3GRYIdE Expected: Consistent underground positioning comparable to prior releases. Actual: Degraded/inaccurate underground positioning on iOS 26.1 beta. Test Devices Left Screen: iPhone 15 Pro Max - iOS 26.1 beta (23B5044i) Right Screen: iPhone 11 - iOS 18.6.2 (22G100) Blue dots show location set by CoreLocation. Red dot on iph
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Oct ’25
CLLocation.sourceInformation.isSimulatedBySoftware not detecting third-party location spoofing tools
Summary CLLocationSourceInformation.isSimulatedBySoftware (iOS 15+) fails to detect location spoofing when using third-party tools like LocaChange, despite Apple's documentation stating it should detect simulated locations. Environment iOS 18.0 (tested and confirmed) Physical device with Developer Mode enabled Third-party location spoofing tools (e.g., LocaChange etc.) Expected Behavior According to Apple's documentation, isSimulatedBySoftware should return true when: if the system generated the location using on-device software simulation. Actual Behavior Tested on iOS 18.0: When using LocaChange sourceInformation.isSimulatedBySoftware returns false This occurs even though the location is clearly being simulated. Steps to Reproduce Enable Developer Mode on iOS 18 device Connect device to Mac via USB Use LocaChange to spoof location to a different city/country In your app, request location updates and check CLLocation.sourceInformation?.isSimulatedBySoftware Observe that it returns false or sourceIn
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Oct ’25
Widget with Core Data guidance
I have an app that has a Core Data store for dates with descriptions that I'd like to present in a widget with countdown calculations. In the app I have a button that just equates an active calculation to the currently selected item in the database (using an EnvironmentObject). I gather I can't use this mechanism inside a widget, right? The user could put tons of items into the database - so I'm sure I don't want to have an editable widget allowing them to pick. I suppose I could create an intent and allow an independent entering from the app - but that seems rather user hostile since they've already entered it for the app - and I'm still trying to support iOS15 which doesn't support that. I did create an App Group and have the Core Data store available from within the widget, but I don't see how to allow the user to choose which date is active. I also want multiple widgets to be able to point to different dates. Any help would be appreciated. Thanks!
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Oct ’25
Critical Issue - Turkish Developer ID Certificates Contain Unhandled Extension
Dear Apple Developer Support, I am experiencing a critical issue with Developer ID certificates issued for Turkish (C=TR) developer accounts that prevents code signing on macOS. Issue Summary All Turkish Developer ID certificates issued on October 4, 2025, contain an Apple proprietary extension (OID 1.2.840.113635.100.6.1.13) marked as critical that both OpenSSL and codesign cannot handle. Technical Details Team ID: 4B529G53AG Certificate Country: TR (Turkey) Issue Date: October 4, 2025 macOS Version: 15.6.1 (24G90) Problematic Extension OID: 1.2.840.113635.100.6.1.13 (marked as critical) Evidence I have verified this issue across THREE different Turkish Developer ID certificates: Serial: 21F90A51423BA96F74F23629AD48C4B1 Serial: 461CBAF05C9EDE6E Serial: 184B6C2222DB76A376C248EC1E5A9575 All three certificates contain the same critical extension. Error Messages OpenSSL: error 34 at 0 depth lookup: unhandled critical extension Codesign: unable to build chain to self-signed root for signer errSecInternal
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Oct ’25