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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New iOS-style App Groups Prevent App Submission
We have a macOS app that has a Photos Extension, which shares documents with the app via an app group container. Historically we used to have an iOS-style group identifier (group.${TeamIdentifier}${groupName}), because we were lead by the web interface in the developer portal to believe this to be the right way to name groups. Later with the first macOS 15 betas last year there was a bug with the operating system warning users, our app would access data from different apps, but it was our own app group container directory. Therefore we added a macOS-style group identifier (${TeamIdentifier}${groupName}) and wrote a migration of documents to the new group container directory. So basically we need to have access to these two app group containers for the foreseeable future. Now with the introduction of iOS-style group identifiers for macOS, Xcode Cloud no longer archives our app for TestFlight or AppStore, because it complains: ITMS-90286: Invalid code signing entitlements - Your application bundle’s signature contains code signing entitlements that aren’t supported on macOS. Specifically, the “[group.${TeamIdentifier}${groupName}, ${TeamIdentifier}${groupName}]” value for the com.apple.security.application-groups key in isn’t supported. This value should be a string or an array of strings, where each string is the “group” value or your Team ID, followed by a dot (“.”), followed by the group name. If you're using the “group” prefix, verify that the provisioning profile used to sign the app contains the com.apple.security.application-groups entitlement and its associated value(s). We have included the iOS-style group identifier in the provisioning profile, generated automatically, but can't do the same for the macOS-style group identifier, because the web interface only accepts identifiers starting with "group". How can we get Xcode Cloud to archive our app again using both group identifiers? Thanks in advance
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311
Mar ’25
Unit tests and persistent tokens
I'd like to implement unit tests that exercise keys made available via a persistent token interface. However, when attempting to list available tokens by passing kSecAttrAccessGroupToken as the kSecAttrAccessGroup to SecItemCopyMatching from a unit test, -34018 is returned. It succeeds without the kSecAttrAccessGroup, which makes sense given the unit test binary does not have com.apple.token Keychain Group. The Xcode UI indicates "Capabilities are not supported" for the unit test binary when attempting to add a Keychain Sharing capability to enable use of persistent tokens. This feels like a dead end but begs the question is there any way to implement unit tests to exercise a persistent token interface? It seems like the only path may be write unit tests that drive an independent app that handles the interactions with the persistent token.
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439
Feb ’25
Apple Sing In on VisionOS
Hello. On my game I have Apple Sing In option that is required to keep user high score, show name in game, and for other app functionality. Game is made on Unity. Now when I'm trying to port the game to Vision Pro, Im getting error that Authentication is not supported on this platform. It may be the plugin issue that I'm using(not sure yet). But I also didn't find any documentation for native code ( so I could make plugin that unity game could use). Question: does VisionOS support Apple Sing In in the applications? if yes please give me some resources. if no - is there any plans to add that functionality? Thanks.
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750
Nov ’24
slot refused to allocate exclusive session for the card
Hi Guys I try to use smart card reader with my ipad project and after trying to make init session with the card got error from cryptotokenkit Message from debug log : [smartcard] slot refused to allocate exclusive session for the card "Session error: Error Domain=CryptoTokenKit Code=-2 "(null)"" // connect to the card mngr?.getSlot(withName: slotName, reply: { (slot:TKSmartCardSlot?) in let card = slot?.makeSmartCard() if card != nil { // begin session card?.beginSession{ ( success:Bool,error:Error?) in if success { // Send 1st APDU card?.send(ins: 0x84, p1: 0x00, p2: 0x00,le:8){ (data:Data?,sw:UInt16,error:Error?) in if error != nil { print("sendIns error:",error!) }else{ print("Response:",data!,String(sw,radix: 16)) //String(format: "%02X", data! as CVarArg) } } }else{ print("Session error:",error!) } } }else{ print("No card found") } })
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436
Nov ’24
Safari has slight variances in people's experience
Hi team, if I log into my app on Safari and try to enroll/challenge MFA security key option, I will be able to see this pop-up that gives me the option to pick either passkeys or external security keys However, my team member who's using the same version of safari, can only see the external security key option Why is this?
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262
Mar ’25
Empty passkey list in ASCredentialIdentityStore
I have been able to save and remove ASPasskeyCredentialIdentities in the ASCredentialIdentityStore. But after saving a ASPasskeyCredentialIdentity, when I retrieve the current identities stored, it always returns an empty list. I check to make sure the store is enabled. I am using this method which is available starting with iOS 17.4: extension ASCredentialIdentityStore { public func credentialIdentities(forService serviceIdentifier: ASCredentialServiceIdentifier? = nil, credentialIdentityTypes: ASCredentialIdentityStore.IdentityTypes = []) async -> [any ASCredentialIdentity] } I have called it like this: store.credentialIdentities(forService: nil, credentialIdentityTypes: .passkey) And this: store.credentialIdentities() Has anyone got this to work?
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325
Feb ’25
Can backgrounded app record phone calls?
I'd like to know: Let's say there's a backgrounded app which has microphone access, such as Signal or SoundHound or Shazam. It's established that these apps are allowed to record audio in the user's environment even after being backgrounded, seemingly for as long as they want and even upload that sound data. But can they ALSO continue recording even while another app that is in the foreground is using the microphone, such as the Phone app or Signal?
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554
Dec ’24
About Configure Sign in with Apple for Email Communication
In response to inquiries from users, we have confirmed the following phenomenon. If you select "Private email address" in the flow of new user registration with Apple ID, you will not receive the verification code email when performing two-factor authentication. ■User impact If you use your Apple ID to link an external account without making your email address public, you will not receive the authentication code during two-factor authentication and will not be able to proceed. The date and time of the impact is currently unknown. ◎Impact 1: New registration If you select "Private email address" in the flow of registering a new user with Apple ID, the verification code will not be received during two-factor authentication and registration will not be completed. ◎Impact 2: Login of existing account When two-factor authentication is required for an existing account registered with Apple ID set to "Private email address," the verification code is not received and the user cannot log in. →If you have not registered a login method other than Apple ID for the relevant account, there is no other way to log in. ■About workarounds ・I thought that I could avoid this issue by canceling the private setting of my Apple ID, but I was unable to do so. →There is currently no workaround found for existing users who are experiencing this issue. ・However, the scope of influence is limited. ■Cause investigation status Premise: For an Apple ID whose email address is not made public, the two-factor authentication authentication code email follows the following route. ①CDC/GIGYA miraiz-persol.jp (SendGrid) Apple's email server (relay server to hide the user's real email address) User mailbox →Since '1' are working, the problem seems to have occurred after the connection from ② or ③. (At this stage, we cannot determine who is at fault: the user, MIRAIZ, or Apple. We are currently investigating.) ◎Hypothesis ・Is there something wrong with Apple's mail server? ・Is it not delivered because the user's mailbox is full? ■Questions, research, and responses we would like to receive Please check the following two points and reply. 1st point As shown in the attached image, there seems to be no problem with the SPF settings. Is it possible to check to see if any errors have occurred with Apple's mail server? 2nd point Are there any cases where you still can't receive emails even if you deactivate your Apple ID? I would like to know if there are any patterns in which emails are not being delivered in terms of past inquiries or overall specifications
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337
Mar ’25
Accessing camera from SSO extension
I'm trying to create an "Extensible Enterprise SSO" extension as described in the Introducing Extensible Enterprise SSO tech talk. My SSO extension works fine, but I want to be able to access the camera (via AVFoundation) from within the SSO extension. According to this thread (which I can't seem to be able to reply to) - it should be possible to access the camera from within an SSO extension, however this doesn't work for me. When I try to access the camera, I get the permission dialog, but after accepting, the camera preview is empty and no camera frames are produced. I don't get any errors/warnings in the logs, but it immediately fires AVCaptureSession.wasInterruptedNotification notification with AVCaptureSessionInterruptionReasonKey = 1 which corresponds to videoDeviceNotAvailableInBackground. However, the SSO extension view controller is clearly not in the background, so is this a bug - or are there special rules for requesting camera permission in an SSO extension? The same camera access works fine in the host app, just not inside the extension. Interestingly, accessing the camera in a WKWebView using various webcam test pages, doesn't work either. All of these tests have been on iPadOS 18.
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511
Nov ’24
Getting 400 response for every time appAttestation url
The token is legitimate, however I keep getting bad requests (400). The payload may not be accurate. No document with the appropriate payload structure is visible to me. Receipt.bin was tried, but the file content could not be verified. Referring this URL: https://developer.apple.com/documentation/devicecheck/assessing-fraud-risk Here is my server side Java code: private static String sendAttestationWithPayload(String jwt, String keyId, String attestationData, String clientData) throws Exception { // Create JSON payload JSONObject payload = new JSONObject(); payload.put("keyId", keyId); payload.put("attestationData", attestationData); payload.put("clientData", clientData); HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create(APPLE_ATTESTATION_URL)) .header("Authorization", "Bearer " + jwt) .header("Content-Type", "application/json") .POST(HttpRequest.BodyPublishers.ofString(payload.toString())) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); handleResponse(response); return response.body(); }
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498
Dec ’24
WebView-Based Authentication in macOS Authorization Plugin
I am developing an Authorization plugin for macOS that should be invoked when a user unlocks their device from the lock screen. Based on advice from the other threads in these forums, I have understood that: The plugin needs to use SFAuthorizationPluginView The auth db entries to modify are system.login.screensaver and authenticate I found the NameAndPassword sample and after making some tweaks to it was able to get it to work from screensaver unlock. I am trying to add Webview-based authentication to the plugin, but have not had any success. The plugin window's width does not change (though the height does) and only a small portion of the HTML gets rendered. Is Webview-based authentication supported with SFAuthorizationPluginView? Are there any alternatives?
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196
Mar ’25
Application not getting identified after notarization
Hi folks We have a Developer ID Application which we create using electron. We made our last release for our Application on Nov'24 which was correctly working. Using the same code, we tried creating a notarized application again which started showing the following error while opening our Application. Monterey- M2- When we directly run the dmg on the dev machine, it does not give us the prompt. But if we download it from somewhere and run, the prompt comes up even in dev machine. We executed some commands to verify the notarization: 1- spctl --assess -vv /Applications/Refresh\ Pro.app On both dev machine and non-dev machine, the output was "accepted" /Applications/Refresh Pro.app: accepted source=Notarized Developer ID origin=Developer ID Application: Prograde Digital Incorporated (*******) 2- xcrun stapler validate /Applications/Refresh\ Pro.app On dev machine, we executed this command and the output is as follows. Processing: /Applications/Refresh Pro.app The validate action worked! 3- codesign -vvv --deep --strict /Applications/Refresh\ Pro.app/ /Applications/Refresh Pro.app: valid on disk /Applications/Refresh Pro.app: satisfies its Designated Requirement We have created a bug attaching the dmg. Please suggest anything we can try to make the release out the door. Bug link- https://feedbackassistant.apple.com/feedback/16811025
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342
Mar ’25
iOS18 webView Client not authorized
Error launching process, description '未能完成操作。(com.apple.extensionKit.errorDomain错误2。)', reason '' GPU process (0x129000ab0) took 3.3203 seconds to launch WebContent process (0x1280180c0) took 5.3785 seconds to launch Failed to create extensionProcess for extension 'com.apple.WebKit.Networking' error: Error Domain=com.apple.extensionKit.errorDomain Code=2 "(null)" UserInfo={NSUnderlyingError=0x302e21b60 {Error Domain=RBSServiceErrorDomain Code=1 "Client not authorized" UserInfo={NSLocalizedFailureReason=Client not authorized, RBSPermanent=false}}}
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791
Oct ’24
Understanding Keychain Errors in Mobile Banking App
Hi, We use the iOS Keychain in our mobile app to securely store and retrieve data, which is tightly coupled with the initialization of some app features within the application. This issue is encountered during app launch We retrieve during Splash Screen UI controller at viewDidApper() The logic we use to access the Keychain is as follows: NSDate *NSDate_CD; NSString *account = [NSString stringWithUTF8String:@"SOME_KEY_ACCOUNT"]; NSString *attrgen = [NSString stringWithUTF8String:@"SOME_KEY"]; NSMutableDictionary *query = [[NSMutableDictionary alloc] init]; [query setObject:(__bridge id)(kSecClassGenericPassword) forKey:(__bridge id&lt;NSCopying&gt;)(kSecClass)]; [query setObject:attrgen forKey:(__bridge id&lt;NSCopying&gt;)(kSecAttrGeneric)]; [query setObject:(__bridge id)(kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly) forKey:(__bridge id&lt;NSCopying&gt;)(kSecAttrAccessible)]; [query setObject: [NSBundle mainBundle].bundleIdentifier forKey:(__bridge id&lt;NSCopying&gt;)(kSecAttrService)]; [query setObject:account forKey:(__bridge id&lt;NSCopying&gt;)(kSecAttrAccount)]; [query setObject:@YES forKey:(__bridge id&lt;NSCopying&gt;)(kSecReturnAttributes)]; [query setObject:@YES forKey:(__bridge id&lt;NSCopying&gt;)(kSecReturnData)]; CFDictionaryRef valueAttributes = NULL; OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, (CFTypeRef *)&amp;valueAttributes); NSDictionary *attributes = (__bridge_transfer NSDictionary *)valueAttributes; if(status==errSecSuccess) { NSDate_CD = [attributes objectForKey:(__bridge id)kSecAttrCreationDate]; } else { NSLog(@"Key chain query failed"); } However, some users have reported intermittent failures during app launch. Upon investigation, we discovered that these failures are caused by exceptions thrown by the iOS Keychain, which the app is currently not handling. Unfortunately, we do not log the exception or the Keychain error code in the app logs at the moment, but we plan to implement this logging feature in the near future. For now, we are trying to better understand the nature of these errors. Could you help clarify the following Keychain errors, which might be encountered from the code above? errSecServiceNotAvailable (-25307) errSecAllocate (-108) errSecNotAvailable (-25291) If these errors are encountered, are they typically persistent or are they temporary states that could resolve on their own? Your insights would be greatly appreciated. Thank you.
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484
Jan ’25
Sign in with Apple: domains to whitelist
We are developing a captive portal for a community Wi-Fi service that will be deployed to thousands of locations around the world. The service is a paid service that sells Wi-Fi connectivity by data volume rather than time. We want to enable our customers to Sign in with Apple without giving them full internet access until they have made a purchase. This requires us to whitelist domains and URLs to make this work. Where can I find a complete list of domains that are required for Sign in with Apple to function correctly? It’s not possible for us to whitelist *.apple.com because that results in significant (free) background network traffic during the sign in process. So far we have whitelisted: account.apple.com appleid.apple.com appleid.apple-cdn.com idmsa.apple.com gsa.apple.com mzstatic.com Our customers are still having issues with Sign in with Apple while interacting with our captive portal in the iOS pseudo browser. How can we debug this because we cannot use the Safari developer tools with the pseudo browser. Are there any logs when doing this on a Mac that we can check in the Console? If we kick the user out to Safari then they are able to complete the Sign in with Apple process, but that is not the user experience we want.
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562
Dec ’24
sending to Private Relay Email using amazon ses not working
Hello Developers, I have ran into a problem while sending mail to apple private relay email. We have built a mobile application where user can sign up through apple and they can sign up using hide-my-email feature. Which provides private relay address for us. Now we want to communicate with them using private relay mail address. The technology we are using to send emails are amazon SES, have done SPF, DMIK, DMARC and added domains in apple identity services for mail communication, passed an SPF check as well. But still mail is not getting delivered what am i doing wrong or apple doesn't support third party apps for sending emails to private relay? Is there any other way to achieve this please let me know Using the same body as attached in image is working fine for rest emails.
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606
Dec ’24
Repeated "Invalid Client" Error with Sign In with Apple
Hi everyone, I'm having a recurring issue with the "Sign in with Apple" integration in my web app, and I’m hoping someone here can help or share insights. Here’s the situation: I implemented "Sign in with Apple" following the official documentation, and it worked perfectly at first. After about two weeks, I started getting the "invalid_client" error when redirecting to the authentication page. I reviewed everything and discovered I hadn’t set up the email configuration properly in the Apple Developer Console. Once I fixed that, it worked fine again. Now, the same error ("invalid_client") has returned, and I’ve triple-checked every part of my configuration: The service ID, redirect URIs, and domain settings match exactly. The client_secret is generated correctly with all required fields (iss, iat, exp, aud, and sub) and signed with ES256. My server time is synchronized. Nothing has changed in my code or configuration since it last worked. This seems to be an issue on Apple’s end because everything was functioning perfectly before, and I’ve already resolved this once by updating settings in the Developer Console. Has anyone else faced this issue? Is there something I might be missing, or could this be a problem with Apple’s service? Any advice or guidance would be greatly appreciated!
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469
Dec ’24
Issues related to “Sign in with Apple” in App transfers
Our product uses the “Sign in with Apple” feature, and now we need to transfer it to Apple. After reading the documentation, I still have questions and would like to get answers. Q1:Transfer App: After the receiving team receives the App, is the unique identifier obtained by the client App program login the original one? Or is it newly generated? If it is newly generated, from what point in time will it be newly generated? Q2:Transfer App: Is there any validity period for the transfer identifier? About how long? What will happen after the transfer identifier is expired? Q3:When does the transfer identifier (transfer identifier) start to be generated, when the transfer request is initiated or when the transfer is completed, and when I get the transfer identifier, can I directly exchange it for the receiving team's unique identifier? Looking forward to a reply, thanks!
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385
Dec ’24