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“A Summary of the WWDC25 Group Lab”

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When building in Xcode on MacOS Tahoe, it seems it is no longer possible to dynamically specify a small size toolbar for NSToolbar/NSToolbarItem. It works in MacOS code compiled and linked on earlier systems. I don't want to use SFSymbol, or templates. I have over 60 custom-made .png toolbars, in individual Image Set files, at the previous requisite sizes of 24x24 / 48x48, and 32x32 / 64x64. Sure -- I can configure an NSToolbar with whatever size .png assets I want. I just can't dynamically switch between the two groups of sizes. According to the Apple Coding Assistant, the only solution is to change the image names of each of the NSToolbarItems at runtime. OK -- but even when attempting that, the NSToolbarItems refuse to take on their smaller size... ...unless: they are attached to a custom view NSToolbarItem with an NSButton of style Bevel. I have about 10 of those, and YES -- I CAN change those to a small size. Is this REALLY what I'm forced to do?! The Apple Coding Assistant just runs me around i

203

Feb ’26

Reply to How can I create a more complex XPCPeerRequirement?

Entitlements and code-signing requirements are very different. See the following for more background on each: TN3125 Inside Code Signing: Provisioning Profiles TN3127 Inside Code Signing: Requirements You can use a code-signing requirement to check for an entitlement, for example: % codesign --verify -R '=entitlement [com.apple.security.app-sandbox] exists' -v /Applications/Pages.app … /Applications/Pages.app: explicit requirement satisfied % codesign --verify -R '=entitlement [com.apple.security.app-sandbox] exists' -v /usr/bin/true … test-requirement: code failed to satisfy specified code requirement(s) However, entitlements are tricky to use in this situation because: You can’t create a provisioning profile that authorises a custom requirement. Many of of the popular entitlements are either unrestricted on macOS, or only restricted in that they clear the entitlement-validate flag [1]. Given that, I think maintaining your previous approach makes sense, that is, check for the Team ID and a list of code-signi

Code Signing Entitlements

Feb ’26

Tensorflow metal: Issue using assign operation on MacBook M4

I get the following error when running this command in a Jupyter notebook: v = tf.Variable(initial_value=tf.random.normal(shape=(3, 1))) v[0, 0].assign(3.) Environment: python == 3.11.14 tensorflow==2.19.1 tensorflow-metal==1.2.0 { name: InvalidArgumentError, message: Cannot assign a device for operation ResourceStridedSliceAssign: Could not satisfy explicit device specification '/job:localhost/replica:0/task:0/device:GPU:0' because no supported kernel for GPU devices is available.nColocation Debug Info:nColocation group had the following types and supported devices: nRoot Member(assigned_device_name_index_=1 requested_device_name_='/job:localhost/replica:0/task:0/device:GPU:0' assigned_device_name_='/job:localhost/replica:0/task:0/device:GPU:0' resource_device_name_='/job:localhost/replica:0/task:0/device:GPU:0' supported_device_types_=[CPU] possible_devices_=[]nResourceStridedSliceAssign: CPU n_Arg: GPU CPU nnColocation members, user-requested devices, and framework assigned devices, if any:n ref (

Machine Learning & AI General tensorflow-metal

176

Feb ’26

Reply to iOS 26+ (some users only) Keychain item readable right after save, but missing after app relaunch (errSecItemNotFound -25300)

Most of the weird keychain failures I see like this are caused by folks using the keychain API incorrectly. I talk about this a lot of in: SecItem: Fundamentals SecItem: Pitfalls and Best Practices However, your additem and readitem summaries look pretty reasonable. It’s hard to see how you could hit the symptoms you’ve described based on this setup. Are you able to reproduce this on a device that you control? Or are you investing this based solely on reports coming in from your users? Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = eskimo + 1 + @ + apple.com

Privacy & Security General

Feb ’26

Reply to iOS Keychain + Derived Credentials: Technical help needed!

Thanks for bringing this to the Apple Developer Forums. First up, I want to double check that this is for iOS. You mentioned the “System Keychain”, which is a macOS thing [1]. On iOS there is only one keychain, known as the data protection keychain. Within that keychain, credentials exist within a keychain access group. Your app’s access to keychain access groups is moderated by entitlements, as explained in Sharing access to keychain items among a collection of apps. Note For a lot more background on keychain APIs, see: SecItem: Fundamentals SecItem: Pitfalls and Best Practices Next, let’s look at your specific questions: [quote='815135021, HSB, /thread/815135, /profile/HSB'] 1- Is there an API that allows us to create a signature without us having to pass the private key itself [/quote] No. iOS does have the ability to work with keys where the key material isn’t directly accessible to your app. We use this, for example, to allow keys to be protected by the Secure Enclave and to support key

Privacy & Security General

Feb ’26

EPERM upon kill(2) of "empty" group

At least on $ uname -r -v -m 25.2.0 Darwin Kernel Version 25.2.0: Tue Nov 18 21:09:55 PST 2025; root:xnu-12377.61.12~1/RELEASE_ARM64_T8103 arm64 running the Posix program test.c #include #include #include #include #include #include int main() { pid_t ch = fork(); if (ch == -1) { perror(fork); return EXIT_FAILURE; } if (ch == 0) { return EXIT_SUCCESS; } if (setpgid(ch, ch) == -1) { perror(setpgid); return EXIT_FAILURE; } siginfo_t stat; if (waitid(P_PID, ch, &stat, WEXITED | WNOWAIT) == -1) { perror(waitid); return EXIT_FAILURE; } if (kill(-ch, SIGKILL) == -1) { perror(kill); return EXIT_FAILURE; } return EXIT_SUCCESS; } as $ clang test.c $ ./a.out kill: Operation not permitted fails with EPERM even though the lifetime of the process group has not yet ended (due to the WNOWAIT).

App & System Services Core OS

105

Feb ’26

iOS 26+ (some users only) Keychain item readable right after save, but missing after app relaunch (errSecItemNotFound -25300)

Hi, I’m seeing a production issue on iOS 26+ that only affects some users. symptoms: It does NOT happen for all users. It happens for a subset of users on iOS 26+. If we write a value to Keychain and read it immediately in the same session, it succeeds. However, after terminating the app and relaunching, the value appears to be gone: SecItemCopyMatching returns errSecItemNotFound (-25300). Repro (as observed on affected devices): Launch app (iOS 26+). Save PIN data to Keychain using SecItemAdd (GenericPassword). Immediately read it using SecItemCopyMatching -> success. Terminate the app (swipe up / kill). Relaunch the app and read again using the same service -> returns -25300. Expected: The Keychain item should persist across app relaunch and remain readable (while the device is unlocked). Actual: After app relaunch, SecItemCopyMatching returns errSecItemNotFound (-25300) as if the item does not exist. Implementation details (ObjC): We store a “PIN” item like this (simplified): addItem: kSecClass: kSec

Privacy & Security General Security

320

Feb ’26

Nested RealityKit entity collisions priority

Hello, I'm struggling trying to interact with a RealityKit entity nested (or at least visually nested) in a second one. I think I've the same issue as mentioned on this StackOverflow post, but I can't manage to reproduce the solution. https://stackoverflow.com/questions/79244424/how-to-prioritize-a-specific-entity-when-collision-boxes-overlap-in-realitykit What I'd like to achieve is to translate the red box using a DragGesture, while still be able to interact using a TapGesture on the sphere. Currently, I can only do one at a time. Does anyone know the solution? extension CollisionGroup { static let parent: CollisionGroup = CollisionGroup(rawValue: 1 << 0) static let child: CollisionGroup = CollisionGroup(rawValue: 1 << 1) } struct ImmersiveView: View { var body: some View { RealityView { content in let boxMesh = MeshResource.generateBox(size: 0.35) let boxMaterial = SimpleMaterial(color: .red.withAlphaComponent(0.25), isMetallic: false) let boxEntity = ModelEntity(mesh: boxMesh, materials: [boxM

Spatial Computing General AR / VR RealityKit

306

Feb ’26

Cannot preview in Xcode

My computer setup is I work from an account with regular (non-admin) privileges. I login into the admin account to install apps, update the OS, that kind of stuff, but work is from the reduced privileges account. And, when in it, I cannot preview swiftUI views in Xcode. Incredibly frustrating, have tried everything including a complete wipeout of the disk and reinstall, but no luck. Don't have any iOS simulator targets installed, it's macOS target I am working on. If I fire up xcode from the admin account it's all good, previes work and so on. Not so in the non-admin account, consistenly getting the Cannot preview in this file. Failed to launch xxxx Also tried elevating the privileges of the account to Admin, rebooting, no luck. Tried creating a new account, non-admin or admin, no luck. The detailed error repeats something along the lines of: == PREVIEW UPDATE ERROR: GroupRecordingError Error encountered during update group #3 ================================== | FailedToLaunchAppError: Failed to lau

Developer Tools & Services Xcode

187

Feb ’26

Reply to com.apple.developer.payment-pass-provisioning missing in TestFlight build despite provisioning profile having it

Hi Quinn, Profile dump with preformed text for your reference is as below. It has com.apple.developer.payment-pass-provisioning => 1: anantpatel@BLR-WS-004 Downloads % security cms -D -i Si_ _ _c_ _d_Distribution_Profile_with_Wallet.mobileprovision| plutil -p - { AppIDName => XC com s_ _ _ _ _ _ _ _d” ApplicationIdentifierPrefix => [ 0 => 2_ _ _ _ _ _ _ _7 ] CreationDate => 2026-02-05 15:09:44 +0000 DER-Encoded-Profile => {length = 3857, bytes = 0x30820f0d 06092a86 4886f70d 010702a0 ... 73b0c49b eb3ffec9 } DeveloperCertificates => [ 0 => {length = 1487, bytes = 0x308205cb 308204b3 a0030201 02021007 ... b474d99f 14730350 } ] Entitlements => { application-identifier => “2_ _ _ _ _ _ _ _7.com.si_ _ _c_ _d aps-environment => production beta-reports-active => 1 com.apple.developer.associated-domains => * com.apple.developer.in-app-payments => [ 0 => merchant.com.si_ _ _c_ _d ] com.apple.developer.networking.slicing.appcategory => [ 0 => communication-9000 1 =>

Code Signing Entitlements

Feb ’26

Reply to Multicast Entitlement now not working

Thanks for the post. When you said you were granted an entitlement for your bundleID? Can you explain where that entitlement came from? More background information: https://developer.apple.com/forums/thread/799000 For support regarding entitlement application and requests: https://developer.apple.com/contact/topic/SC1102/subtopic/30072/solution/select So would you mind provide more information about that entitlement and a few checks I always recommend is, in your Apple Developer portal, review Access Groups and Entitlements to ensure nothing has changed or been revoked. Sometimes, older tooling may cache incorrect provisioning data, try cleaning build folders and restarting Xcode. When you said is not longer provisioned? I would, revoke existing distribution certificates and provisioning profiles, then generate new ones. Looking forward to know more about that entitlement. But we have other experts here that will jump into this thread when you provide the information probably. Cheers, Albert Pascual 

App & System Services Networking

Feb ’26

Apple Developer Program Delays And Possible Solution

I've been wating for 5 business days now and one weekend to get my Apple Developer ID approved. This does delay the publishing of applications. Could a possible solution be delegating the work to other groups? Could the employees in physical stores be included in this work, if the staff allocated to this in head office are not sufficient?

Developer Tools & Services Apple Developer Program

Feb ’26

Could not install [APP]. The requested app is not available or doesn't exist.

I've created a new app on App Store Connect. Setup everything like all the forms, the build, users, internal testing group, and then sent the invitation emails for testing. Now users can see the app in the TestFlight but when they try to install it, they get the error below. Could not install [APP]. The requested app is not available or doesn't exist. I've sent an email to Apple support couple of days ago but still no response. Saw some comments on the internet that you need to send your app for review and once it's approved you can use TestFlight. So I sent the app for review with a long description about how I'm not able to use TestFlight but still on wait. Tried to create a public TestFlight link but I get this error: Beta contract is missing for the app. but there's actually no contract anywhere. What do I do? This is completely unacceptable. Why is the TestFlight not working? Why are the error messages not helpful?

App Store Distribution & Marketing TestFlight

132

Feb ’26

Shield Action Extension rejected by App Store Connect – Invalid NSExtensionPointIdentifier for ManagedSettingsUI

Hello, I’m using the Screen Time API / Family Controls in my iOS app Sobre and I’m having an issue submitting a new build to TestFlight. My app setup is as follows: Main app ID: com.balthazar.sobre App extensions: Device Activity Monitor: com.balthazar.sobre.deviceactivitymonitor Shield Configuration: com.balthazar.sobre.shieldconfiguration Shield Action: com.balthazar.sobre.shieldaction On the Apple Developer portal: Family Controls (Distribution) is enabled for: the main app ID com.balthazar.sobre and all 3 extension App IDs above. App Groups are also configured for the app and the extensions. New App Store provisioning profiles have been generated for the app and all 3 extensions and are used in the latest build. When I submit the build through App Store Connect (via Fastlane / EAS), validation fails only for the Shield Action extension with this error: Invalid Info.plist value. The value of the NSExtensionPointIdentifier key, com.apple.ManagedSettingsUI.shield-action-service, in the Info.plist of

App & System Services General Family Controls Managed Settings Screen Time

220

Feb ’26

Abnormal Background Delivery Frequency of HealthKit on Specific watchOS Devices

1/ Issue Summary In our application, we use HKObserverQuery together with:HKHealthStore.enableBackgroundDelivery(for:frequency: .immediate) to enable HealthKit Background Delivery, allowing the system to wake our App Extension in the background to process health data updates. Under the same app build, identical HealthKit permission configuration, and the same watchOS version, we have observed significant differences in background delivery frequency across different devices. Specifically, on certain devices (e.g. Apple Watch Series 10, watchOS 26.2.1), the background delivery frequency is significantly reduced, behaving as if it is capped at approximately once per hour. On other control devices, under the same configuration, background delivery is triggered much more frequently and consistently, at approximately every 8–16 minutes. This behavior is consistently reproducible on the affected devices. **We would like to understand whether there are any officially recommended implementation patterns, best

App & System Services Health & Fitness HealthKit

411

Feb ’26