Prioritize user privacy and data security in your app. Discuss best practices for data handling, user consent, and security measures to protect user information.

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Accessing the key generated by DCAppAttestService
Hi, is it somehow possible to access a key that was generated by the DCAppAttestService generateKey() function? I need to be 100% sure that no actor from within or outside of my app can access the generated key with the DeviceCheck Framework. It would also be helpful to get some official resources to the topic. Thank you in advance, Mike
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262
Oct ’25
Sign in with Apple
Hey there, I’m currently exploring the possibility of integrating Sign in with Apple into my iOS app and backend. Regarding the iOS app, I’ve read that when a user is signed in, you always need to call getCredentialState on the app’s launch. Is this true? If so, how is it possible to sign the user out then? I intend to incorporate SwiftData and CloudKit into my application. In light of this, I’m curious about your approach to user management. Specifically, I’m wondering if you would store the user’s data in a Redis database after successful authentication on the backend. Or, would you separate the user data and save it using SwiftData/ CloudKit?
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366
Feb ’25
macOS Gatekeeper gatekeeping text files?
I have something with a new individual on my team I've never seen before. They checked out our code repository from git and now anytime they try to open a .json file that is legitimately just a text file, GateKeeper tells them it cannot verify the integrity of this file and offers to have them throw this file away. I've seen this with binaries, and that makes sense. I removed the com.apple.quarantine extended attribute from all executable files in our source tree, but I've never seen GateKeeper prompt on text files. I could remove the extended attribute from all files in our source tree, but I fear the next time he pulls from git he'll get new ones flagged. Is there someway around this? I've never personally seen GateKeeper blocking text files.
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632
Feb ’25
Command Line Tool doesn't trigger permission prompt for audio recording
Hello, I'm developing a Command Line Tool in XCode, in order to capture system audio and save it to a file, which will then be used by a separate process. Everything works perfectly when running it from either XCode or the native terminal application (see image below), but as soon as I try to run it from any 3rd party application, it doesn't ask for permissions to record sound, and the resultant file ends up soundless. When archiving it and then running it from other 3rd party applications, e.g Warp (terminal) or spawning it as a child process from a bundled Electron application, it doesn't ask for permissions. Things of note: I've codesigned the application with "Developer ID Application" I've added NSAudioCaptureUsageDescriptionto Info.plist I've included Info.plist in the binary (see image below) I've added the com.apple.security.device.audio-input entitlement I've used the following resources as inspiration: https://github.com/insidegui/AudioCap https://developer.apple.com/documentation/coreaudio/capturing-system-audio-with-core-audio-taps As my use-case involves spawning the executable from Electron as a child process, I've tried to include the appropriate permissions to the parent application too, without success. I'm really at a loss here, it feels like I've tried everything. Any pointers are much appreciated! Thanks
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689
Dec ’24
Issue Updating User Password via OpenDirectory API with Root Daemon Privileges
Description: I am attempting to use the OpenDirectory API ODRecord.changePassword to change a user's password without needing the old password, given that I have the appropriate permissions. The goal is to ensure that the password change operation bypasses third-party tools such as EDR or eBPF apps that might otherwise intercept commands, as the operation occurs directly via the API. Problem: When invoking the OpenDirectory API from a launch daemon with root privileges, I receive the following error message: Error Domain=com.apple.OpenDirectory Code=4001 "Operation was denied because the current credentials do not have the appropriate privileges." UserInfo={NSUnderlyingError=0x135907570 {Error Domain=com.apple.OpenDirectory Code=4001 "Credential cannot update user's SecureToken" UserInfo={NSDescription=Credential cannot update user's SecureToken}}, NSLocalizedDescription=Operation was denied because the current credentials do not have the appropriate privileges., NSLocalizedFailureReason=Operation was denied because the current credentials do not have the appropriate privileges.} It seems the error is related to SecureToken, and the underlying issue is that the current credentials (even though they are root-level) do not have the necessary privileges to update the SecureToken status for the user. Steps I’ve Taken: Tested the API via a launch daemon running with root privileges. Ensured that Full Disk Access was granted to the daemon, but this did not resolve the issue. Request: Has anyone encountered this specific issue where root privileges are insufficient to update the user password via the OpenDirectory API ? What additional steps or permissions are required for a user password change? Is there a specific API or method to elevate the privileges for modifying SecureToken, or a workaround to overcome this limitation? Any insights or guidance on this issue would be greatly appreciated! Thank you in advance for your help!
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685
Jan ’25
Enquiry about the Apple DeviceCheck service
Recently, we received an user enquiry regarding the inability to perform bookings for the app. After investigation, we found that the issue appears to be caused by the failure of the Apple DeviceCheck service. Based on our checks, approximately 0.01% of requests fail each day (e.g., on 26 June: 6 failures out of 44,544 requests) when using Apple DeviceCheck. Could you please assist in raising the following enquiries with Apple Support? What is the typical failure rate of Apple DeviceCheck? Are there any reliability metrics or benchmarks for its performance? How can the failures be prevented, or is there a recommended retry mechanism to handle such failures? Does the iOS version affect the performance or reliability of Apple DeviceCheck? Are there known issues or limitations with specific iOS versions? How long does the token remain valid, and when should a new one be retrieved? Does using a jailbroken device affect the functionality of Apple DeviceCheck?
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243
Jul ’25
Unable to give permission to app I'm building to access devices on local network on Sequoia - no prompt given
I am developing apps using NWJS framework, which access devices on the local network. I am doing this on Sequoia on Macos (Desktop). I have developed other apps using NWJS before, but on earlier versions of Macos. My issue is, I am unable to give my app permission to app to access devices on local network on one of the apps. Some background: Other apps which I have used which access devices on the local network, on first-time launching, have given a prompt asking me if I want to allow or deny access to local device for the app. However, on first-time launching (and many others after that), It simply says the device cannot be reached, and I never get a prompt asking me if I want to allow or deny access to local device for my app. In its barebones proof-of-concept stage of my app, I have an iframe who's src attribute is the IP address of a device known on the network with that address. I have tried the protocol https://192.168.1.99 and http://192.168.1.99 in the src attribute. This protocol works in another app I have built where upon first-time launch, I was able to get a prompt and give it the needed permission. If I check in System Settings > Privacy and Security > Network, the app doesn't appear where I can toggle a setting. I also am unable to explicitly add my app to the list. ** This worked for one app, but not another: In researching this issue, it was recommended that I add the following keys in info.plist: com.apple.developer.networking.multicast - boolean true NSLocalNetworkUsageDescription - string description NSNearbyInteractionUsageDescription - string description This worked for one of my apps, but not another, which has a nearly identical structure. In fact, other than CFBundleIdentifier, CFBundleDisplayName and CFBundleName, info.plist is identical. Why did this work one time, and how can I get my app to prompt for permission for local network access?
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547
Dec ’24
Authentication Services uses Safari when it is not the default browser and fails the flow anyway
We are developing an app that uses Authentication Services to authenticate users. According to the documentation, this framework will open the default web browser if it supports auth session handling, and Safari otherwise. This is not entirely true, and users will be frustrated! macOS version: Sequoia 15.5; Safari version: 18.5. When: The default browser is not Safari, and supports auth session handling (Google Chrome and Microsoft Edge as examples); and - The Safari app is already running; The auth flow will: Present the confirmation dialog box with the default browser icon. Good! Open a Safari window, instead of the default browser's one. Bad! Respond with "User Cancelled" error to the app, after making the end user believe the auth was good. Very Bad!! If the app retries the auth session, the default browser window will open as expected, and it will work as expected. However, requiring users to authenticate twice is a very bad users experience... This issue does not reproduce, when either: Safari is not running at the moment of auth session start; The default browser does not support auth session handling; or - Safari is the default browser. Fellow developers, be warned! Apple engineers, feedback #18426939 is waiting for you. Cheers!
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84
Jun ’25
DCDevice.current.generateToken Is it safe to cache tokens for less than 1s ?
We have a crash on DCDevice.current.isSupported We want to try to make a serial queue to generate tokens but the side effect would be the same token would be used on multiple server API requests that are made within a few ms of each other? Is this safe or will the Apple server immediately reject the same token being reused? Can you share how long tokens are safe to use for? Here is the code we want to try final actor DeviceTokenController: NSObject { static var shared: DeviceTokenController = .init() private var tokenGenerationTask: Task<Data?, Never>? var ephemeralDeviceToken: Data? { get async { // Re-using the token for short periods of time if let existingTask = tokenGenerationTask { return await existingTask.value } let task = Task<Data?, Never> { guard DCDevice.current.isSupported else { return nil } do { return try await DCDevice.current.generateToken() } catch { Log("Failed to generate ephemeral device token", error) return nil } } tokenGenerationTask = task let result = await task.value tokenGenerationTask = nil return result } } }
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569
Jul ’25
Missing privacy manifest
Hi, The email attached states that we need to add GoogleToolboxForMac's missing privacy manifest. I received the attached report after running my app privacy report, however it is different and does not include GoogleToolboxForMac. I'm not sure if we need to add the privacy manifest for GoogleToolboxForMac alone or for both of them. If yes, what should I put in my privacy manifest for GoogleToolboxForMac? IS IT BELOW CODE NEED TO ADD IN PRIVACY MANIFEST OR IS IT BELOW CODE NEED TO ADD IN PRIVACY MANIFEST Please reply ASAP Regards, Viharshitha
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1.8k
Feb ’25
Issue with "NSUserTrackingUsageDescription" Blocking App Update Submission
Hi everyone, I’m currently facing an issue while trying to submit an update for my app to the App Store. The review process is blocking the update due to a "Privacy - Data Use and Sharing" warning, stating that our app requests "tracking purchase history for tracking purposes." However, we have already removed this functionality and deleted the NSUserTrackingUsageDescription key from our latest build. Despite this, the warning persists, and we are unable to proceed with the update. I have already contacted Apple Support, but in the meantime, I wanted to ask the community: Has anyone else encountered this issue, and if so, how did you resolve it? Is there a way to force a refresh of privacy-related settings in App Store Connect? Are there any additional steps we need to take to completely remove this tracking flag from our app submission? Any insights or guidance would be greatly appreciated! Thanks in advance for your help.
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573
Feb ’25
Help with Passkey Registration & Authentication on iOS 17 (Credential Provider + Error Code 1004)
I’m implementing passkey registration and authentication in an iOS 17 app with a credential provider extension, but I’m running into an issue. Setup: I have a credential provider target configured. The app correctly shows the pop-up to register the passkey with my app. My Info.plist is set up properly. Issue: When the following function is triggered: override func prepareInterface(forPasskeyRegistration registrationRequest: ASCredentialRequest) { "code to generate registrationRequest..." let controller = ASAuthorizationController(authorizationRequests: [registrationRequest]) controller.delegate = self controller.presentationContextProvider = self controller.performRequests() } I get the following error: Domain=com.apple.AuthenticationServices.AuthorizationError Code=1004 I do not own the relying party domain (e.g., https://webauthn.io), so I cannot configure an apple-app-site-association file on the website. Question: How can I register and authenticate passkeys on any site that allows passkeys (such as webauthn.io) when I don’t control the webpage? Are there any workarounds or best practices for handling this in iOS 17? Any insights would be greatly appreciated!
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Sep ’25
Share session from ASWebAuthenticationSession with WKWebView
Hello everyone, In my application, i have implemented authentication using ASWebauthenticationSession. However, when redirecting the user to a WKWebView, no cookies are shared, causing the session to be lost and requiring the user to log in again. Is there a way to share cookies between the two? If not, what would be the best approach to set up authentication that ensures SSO when switching to a WebView ? Thank you very much for your help !
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466
May ’25
how can i pass the passkeyRegistration back to the user agent(web)
After registe Passkey with webauthn library, i create a passkeyRegistration with follow, let passkeyRegistration = ASPasskeyRegistrationCredential(relyingParty: serviceIdentifier, clientDataHash: clientDataHashSign, credentialID: credentialId, attestationObject: attestationObject) and then completeRegistrationRequest like that, extensionContext.completeRegistrationRequest(using: passkeyRegistration) But a bad outcome occurred from user agent. NotAllowedError:The request is not allowed by the user agent or the platform in the current context. And the return data rawID & credentialPublicKey is empty,
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244
Jul ’25
Critical iOS Activation Vulnerability
There’s a critical, actively exploited vulnerability in Apple’s iOS activation servers allowing unauthenticated XML payload injection: https://cyberpress.org/apple-ios-activation-vulnerability/ This flaw targets the core activation process, bypassing normal security checks. Despite the severity, it’s barely discussed in public security channels. Why is this not being addressed or publicly acknowledged? Apple developers and security researchers should urgently review and audit activation flows—this is a direct attack vector on device trust integrity. Any insights or official response appreciated.
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217
Jun ’25
Different PRF output when using platform or cross-platform authentication attachement
Hello, I am using the prf extension for passkeys that is available since ios 18 and macos15. I am using a fixed, hardcoded prf input when creating or geting the credentials. After creating a passkey, i try to get the credentials and retrieve the prf output, which works great, but i am getting different prf outputs for the same credential and same prf input used in the following scenarios: Logging in directly (platform authenticator) on my macbook/iphone/ipad i get "prf output X" consistently for the 3 devices When i use my iphone/ipad to scan the qr code on my macbook (cross-platform authenticator) i get "prf output Y" consistently with both my ipad and iphone. Is this intended? Is there a way to get deterministic prf output for both platform and cross-platform auth attachements while using the same credential and prf input?
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1k
Apr ’25
Can you use App Attest in Enterprise Builds?
I'm a bit confused about if using App Attest is possible in enterprise builds. It shows up under identifiers in the apple dev portal and I can add it to my provisioning file and entitlements file. But if I go to keys I cannot create a key for it. This page implies it can be used for enterprise builds: After distributing your app through TestFlight, the App Store, or the Apple Developer Enterprise Program, your app ignores the entitlement you set and uses the production environment.
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129
May ’25
Impact of SIWA App transfer on migration on relay emails
Hello, we're currently evaluating the side effects of transferring our app to a different Apple developer account. Our users use SIWA to sign in to our platform which uses Auth0. As I understand it, the identifiers provided by Apple will change, and as such Auth0 will not recognise them and treat them as new users. I've read conflicting documentation, reports, discussions, etc, so it would be great if I could get some clarification on the topic. Furthermore we're concerned about the Hide My Email functionality. A lot of our users use this feature. Will the relay email for each user change with the transfer? If so, does the 'old' relay email stop working as soon as the transfer happens? Thanks in advance!
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343
Mar ’25