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Delve into the physical components of Apple devices, including processors, memory, storage, and their interaction with the software.

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My user can't pair bluetooth peripheral, due to device lost in SYSTEM BLUETOOTH PREPHERAL LIST
[sysdiagnose_2025.10.01_18-29-27+0800_iPhone-OS_iPhone_23A341] I got sysdiagnose from my app user.He can't pair his bluetooth peripheral. in the sysdiagnose,I found this: device AC:7A:94:85:47:F4 is already paired, with a different irk (old:F5 C9 4F 5A 4E BE D0 20 0A 1F F7 DC 3A 89 E0 3A new 4A 8A 00 4C FF D0 CE 7B 61 13 FA B3 84 F4 65 29 ). Unpair first and then restart pairing. (status=65535) but there is no device in his iphone's SYSTEM BLUETOOTH PREPHERAL LIST. I don't know how to delete the irk info when you can't find it in SYSTEM BLUETOOTH PREPHERAL LIST. PLEASE answer me. THANKS.
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Oct ’25
CallKit Display and Audio Output Mismatch with Unintended UI Reversion
I'm building a React Native call application using the following combination of libraries: https://github.com/react-native-webrtc/react-native-callkeep https://github.com/react-native-webrtc/react-native-webrtc https://github.com/react-native-webrtc/react-native-voip-push-notification When I press the speaker button on the call screen displayed by CallKit and change it to ON, the speaker button display on the call screen reverts back to OFF after a few seconds. However, when the speaker button display reverts to OFF, the actual audio output route does not return to the earpiece - the audio continues to output from the speaker without any change. Could you please advise on what cases might cause the speaker button display to revert, and if there are any potential solutions?
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135
Oct ’25
Alternative to generate programmatically a local hotspot like in Android?
Hello, we are developing hardware that needs to connect to an iPhone via Wi-Fi to send requests to a server. On Android, we have managed to create a programmatic local hotspot within the app to facilitate connection and improve the user experience. On iOS, however, Personal Hotspot must be manually enabled from the system settings, and the user must manually enter the SSID and password, which significantly degrades the UX. My questions are: Is there a workaround, unofficial method, or private API to generate a local hotspot from an app on iOS, similar to what can be done on Android? Is there an alternative within the MFi program or through specific frameworks to facilitate a quick and automatic connection between the hardware and the iPhone without relying on the manual Personal Hotspot? Are there any best practices for improving the local Wi-Fi connection experience between an accessory and an iPhone in the absence of hotspot controls? I would appreciate any guidance, experience, or resources that would help me better understand the feasible options in iOS for scenarios where fast and direct communication between hardware and mobile devices via Wi-Fi is required. Translated with DeepL.com (free version)
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Oct ’25
L2TP VPN broken on MacOS 13/Ventura
Dove in and upgraded two Macs today to beta 1. Unfortunately, it appears L2TP VPN is broken or something changed in the way it works. I can longer get a connection to any VPN concentrator I used previously. I tested with Cisco Anyconnect SSL VPN client and can connect to the same concentrators (as they're configured to accept L2TP or SSL clients). I also tested from my phone running iOS 16 beta and it still works for the L2TP connections. The Mac not working with L2TP VPN ppp.log shows this Fri Jun 10 19:18:52 2022 : L2TP connecting to server 'IP removed' (IP removed)... Fri Jun 10 19:18:52 2022 : IPSec connection started Fri Jun 10 19:18:52 2022 : IPSec phase 1 client started Fri Jun 10 19:19:02 2022 : IPSec connection failed Connecting a Mac successfully on 12.4 the log shows Fri Jun 10 19:12:33 2022 : L2TP connecting to server 'IP removed' (IP removed)... Fri Jun 10 19:12:33 2022 : IPSec connection started Fri Jun 10 19:12:33 2022 : IPSec phase 1 client started Fri Jun 10 19:12:33 2022 : IPSec phase 1 server replied Fri Jun 10 19:12:34 2022 : IPSec phase 2 started Fri Jun 10 19:12:34 2022 : IPSec phase 2 established Fri Jun 10 19:12:34 2022 : IPSec connection established (and then a ton more lines of the entire process ending with client getting an IP that I won't bother posting) VPN wasn't high on my list of apps I was concerned about breaking with the beta. But, now that it is broke and I need it for work I'm kinda screwed myself. Anyway, if anyone knows a way to fix this please let me know.
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Oct ’25
isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method cannot determine whether the camera is available, please provide an available judgment method
Prerequisite: After the MDM APP issues the command, the camera on the phone is no longer visible (unusable). After upgrading to iOS 26.1, the isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method keeps returning true when the camera is unavailable. The isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method on iOS 26.0.1 is normal, returning false when the camera is unavailable and true when it is available. Please fix this method to determine If the isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method cannot determine whether the camera is available, please provide an available judgment method.
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116
Oct ’25
Not Getting Realistic Camera Output Even After Capturing RAW (.dng) Images on iOS
Hi everyone, I’m working on a custom camera implementation in iOS using native code. My goal is to capture unprocessed, realistic images directly from the camera — without any filters or post-image processing applied by the system. I’ve implemented RAW image capture using the native camera APIs (AVFoundation) and successfully received .dng files. However, even the RAW outputs don’t look like the real environment — the colors, tone, and exposure still seem processed or corrected in some way. I’ve tried various configurations such as photoSettings.rawPhotoPixelFormatType, experimenting with AVCaptureDevice and AVCapturePhotoOutput settings, and reviewing ProRAW and standard RAW behavior, but I’m still not getting truly unprocessed results that reflect the actual sensor data. Has anyone experienced similar results when capturing RAW images on iOS, or found a way to bypass Apple’s image signal processing (ISP) pipeline for more realistic captures? Any insights or references from Apple’s camera framework behavior would be greatly appreciated. Thank you!
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127
Oct ’25
Wallet no longer appear near iBeacon
Hello, We are testing Wallet passes with iBeacons in iOS 26 Beta. In earlier iOS releases, when a device was in proximity to a registered beacon, the corresponding pass would surface automatically. In iOS 26 Beta, this behavior no longer occurs, even if the pass is already present in Wallet. I have not found documentation of this change in the iOS 26 release notes. Could you please confirm whether this is expected in iOS 26, or if it may be a Beta-specific issue? Any pointers to updated documentation would be appreciated. Thank you.
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Oct ’25
2.1.0 Performance: App Completeness
Hi everyone, I submitted an app for review and was met with a rejection for unresolved issues. This was what was asked in the rejection: Provide detailed answers to the following questions: -Does your app interact with any hardware? Would that be referring to the camera/microphone of the device? My app uses haptics when you select an option. I didn't see anything in connect where I needed to specify the use of haptics. Also, does this mean that when the reviewer answers me I have to resubmit as a version 1.1? I'm not sure what I would need to change. This is my first app so I'm not entirely sure on the procedure.
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Oct ’25
Why is CoreNFC unavailable from App Extensions (appex)? Any supported workarounds for authenticators?
Hi everyone — I’m developing an iOS passkey/password manager where the private key material must be stored on a physical device (NFC card / USB token). I’m hitting a hard limitation: CoreNFC is not available for use from app extensions, which prevents an appex (e.g. password/credential provider or other extension) from talking directly to an NFC card during an authentication flow.  My questions: 1. Is there any plan to make CoreNFC (or some limited NFC-API) available to app extensions in a future iOS version? If not, could Apple clarify why (security/entitlements/architecture reasons)? 2. Are there any recommended/approved workarounds for a passkey manager extension that needs to access a physical NFC token during authentication? (For example: background tag reading that launches the containing app, or some entitlement for secure NFC card sessions.) I’ve read about background tag reading, but that seems to be about system/OS handling of tags rather than giving extensions direct NFC access.  3. Is the only supported pattern for my use case to have the containing app perform NFC operations and then share secrets with the extension via App Groups / Keychain Sharing / custom URL flow? (I’m already evaluating App Groups / Keychain access groups for secure sharing, but I’d like official guidance.)  Implementation details that may help responders: • Target: iOS (latest SDK), building a Credential Provider / password manager extension (appex). • Intended physical token: NFC smartcard / ISO7816 contactless (so CoreNFC APIs like NFCISO7816Tag would be ideal). • Security goals: private key never leaves the physical token; extension should be able to trigger/sign during a browser/app AutoFill flow. Possible alternatives I’m considering (open to feedback): designing the UX so that the extension opens the main app (only possible for Today widget in a supported way) which runs the NFC flow and stores/returns a short-lived assertion to the extension. Are any of these patterns sanctioned / recommended by Apple for credential providers?  Thanks — any pointers to docs, entitlement names, or example apps/samples would be extremely helpful.
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Oct ’25
Mac Catalyst: IOHID InputReportCallback not firing, USBInterfaceOpen returns kIOReturnNotPermitted (0xe00002e2) for custom HID device
Hi everyone, I am developing a .NET MAUI Mac Catalyst app (sandboxed) that communicates with a custom vendor-specific HID USB device. Within the Catalyst app, I am using a native iOS library (built with Objective-C and IOKit) and calling into it via P/Invoke from C#. The HID communication layer relies on IOHIDManager and IOUSBInterface APIs. The device is correctly detected and opened using IOHIDManager APIs. However, IOHIDDeviceRegisterInputReportCallback never triggers — I don’t receive any input reports. To investigate, I also tried using low-level IOKit USB APIs via P/Invoke from my Catalyst app, calling into a native iOS library. When attempting to open the USB interface using IOUSBInterfaceOpen() or IOUSBInterfaceOpenSeize(), both calls fail with: kIOReturnNotPermitted (0xe00002e2). — indicating an access denied error, even though the device enumerates and opens successfully. Interestingly, when I call IOHIDDeviceSetReport(), it returns status = 0, meaning I can successfully send feature reports to the device. Only input reports (via the InputReportCallback) fail to arrive. I’ve confirmed this is not a device issue — the same hardware and protocol work perfectly under Windows using the HIDSharp library, where both input and output reports function correctly. What I’ve verified •Disabling sandboxing doesn’t change the behavior. •The device uses a vendor-specific usage page (not a standard HID like keyboard/mouse). •Enumeration, open, and SetReport all succeed — only reading input reports fails. •Tried polling queues, in queues Input_Misc element failed to add to the queues. •Tried getting report in a loop but no use.
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Oct ’25
The iPhone 17 series is unable to connect to the Bluetooth module BK3432.
When our Bluetooth device is scanned and a connection is initiated through the app on the iPhone 17, the air log shows that the iPhone sends an LL_LENGTH_REQ to execute the Data Length Update Procedure. However, our peripheral does not support the Bluetooth LE Data Length Extension, so it responds with an LL_UNKNOWN_RSP PDU with the UnknownType field set to LL_LENGTH_REQ. After receiving the LL_UNKNOWN_RSP, the iPhone 17 does not proceed with the subsequent Bluetooth LE service discovery process. The connection is maintained until the peripheral actively disconnects. Once the peripheral disconnects and continues broadcasting Bluetooth signals, the iPhone 17 repeatedly tries to connect to the peripheral and executes the aforementioned process, even if the app has been terminated. According to the Bluetooth 4.2 core specification ([Vol. 6] Part B, Section 5.1.9), which can be found here: https://www.bluetooth.com/specifications/specs/core-specification-amended-4-2/, the iPhone should accept the LL_UNKNOWN_RSP and terminate the Data Length Update Procedure after receiving it, proceeding with the subsequent operations using the default minimum parameters. Phenomenon: When the app calls the - (void)connectPeripheral:(CBPeripheral *)peripheral options:(nullable NSDictionary<NSString *, id> *)options method, the connection result callback is never received. After a period of approximately 10 seconds, it fails with a callback, displaying the message: central did fail to connect to peripheral: <TY : 45E4A697-31AE-9B5A-1C38-53D7CA624D8C, Error Domain=CoreBLEErrorDomain Code=400 "(null)">.
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Oct ’25
Since I updated my iPhone 13 to this new update I have two problems.
Since I updated my iPhone 13 to this new update I have two problems First: the battery discharges too fast or it gets stuck and doesn't discharge until I turn it off and turn it back on. Second: I see in my screen time a page that I had never seen is called imasdk.googleapis.com which I had never occupied and they tell me that it is a failure of the new update I hope you can help me fix that, since this mobile phone is new and already brings the faults by the ios
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137
Oct ’25
iPhone/iPad DFU and Apple deviceinterfaced process
Problem Description: Since Our USB hubs are capable of sending Vendor Defined Messages (VDMs) over a USB Type-C cable connection, they can programmatically place iOS, iPadOS, and macOS devices into DFU mode—without requiring any physical button interaction. Recently, we identified an issue when invoking DFU mode on an iPhone 15 using this method. Upon entering DFU mode, the device enumerates with USB Product ID 0x1881 (“Debug USB” – KIS interface). At that point, the deviceinterfaced daemon (launched by launchd) immediately detects the device and claims exclusive access to the USB interface. As a result, when our API Service attempts to communicate with the device through standard IOKit methods, it fails with the following error: 0xe00002c5 ((iokit/common) exclusive access and device already open) This prevents our libraries from reading the iBoot string (USB serial number string) that Apple devices normally expose in standard or recovery modes—information that includes ECID, CPID, CPRV, CPFM, BDID, and SCEP. This creates a significant barrier, as our API service becomes unable to perform subsequent device restoration operations as we missed the critical information. Request for Guidance: I’ve included the following context for your analysis and review. Using the launchctl unload command can temporarily stop it; however, I’d like to know if there’s an API-level mechanism to programmatically prevent deviceinterfaced from claiming access from within our API Service. Could you please advise on the following points? 1.  Managing deviceinterfaced Access • What is the proper way to stop or prevent deviceinterfaced from claiming exclusive access in this case, so that the API Service can read device information and starts restoring the device from that point? • Is there a recommended method or entitlement that allows third-party services to communicate with Apple devices while they are in Debug USB (KIS) mode? 2.  Guidelines and API Access • Are there any Apple-supported APIs or developer guidelines that would permit controlled access to the iBoot interface without conflicting with deviceinterfaced?
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Oct ’25
help getting audio verbs macOS Tahoe Deep Debug Logs
Im running macOS Tahoe and I have the proper nvram boot-args , however when I try to poke the log stream im not getting any verb information related to the card im using. The audio system im using is AppleHDA.kext from the Beta 1 KDK. I've tried asking AI it doesn't make a difference what it suggests to me..... In the meantime of while im asking for assistance what ill do is go ahead and let it template me a kernel extension that I guess just traffics it to the Log for me and hopefully this isn't filtered out as what I suspect is it saying is happening is is that it actually masks some of the information. Why am I doing this? not For the Linux Driver its so I can see from the Log where it came from as this is what the developer said he did GitHub/davidjo/snd_hda_macbookpro is the kabylake iMac.
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Oct ’25
IOS 26.1 isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method keeps returning true when the camera is unavailable
Prerequisite: After the MDM APP issues the command, the camera on the phone is no longer visible (unusable). After upgrading to iOS 26.1, the isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method keeps returning true when the camera is unavailable. The isSourceTypeAvailable: UIImagePickerControlSourceTypeCamera method on iOS 26.0.1 is normal, returning false when the camera is unavailable and true when it is available.
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Nov ’25
Assistance Needed: Accessing Smartcard Certificates for Document Signing on iOS
We are preparing to implement document signing using USB tokens on iOS and macOS. Several other applications already support this feature. From my testing and development efforts, I've been unable to reliably access or utilize certificates stored on a smartcard through the iOS APIs. Here are the specifics: Environment iOS: 15 and later Xcode: Versions 18 and 26 Smartcard/Token: ePass 2003 (eMudhra), Feitien token (Capricorn) Observed Issue : The token is recognized at the system level, with certificates visible in Keychain Access. However, programmatic access to the private keys on the smartcard from within the app is not working. Signing attempts result in Error 6985 and CACC errors. Approaches Tried: Updated provisioning profiles with the following entitlements: com.apple.developer.smartcard com.apple.security.device.usb TKSmartCard Employed TKSmartCard and TKSmartCardSession for interaction. The token is detected successfully. A session can be established, but there's no straightforward method to leverage it for certificate-based signing. Access to signing functions is unavailable; operations yield Error 6985 or CACC errors. if let smartCard = TKSmartCard(slot: someSlot) { smartCard.openSession { session, error in if let session = session { let command: [UInt8] = [0x00, 0xA4, 0x04, 0x00] session.transmit(Data(command)) { response, error in print("Response: \(String(describing: response))") print("Error: \(String(describing: error))") } } } } TokenKit (macOS/iOS) - Utilized TKTokenWatcher to identify available tokens on macOS (not available on iOS). watcher.setInsertionHandler { tokenID in print("Token detected: \(tokenID)") } CryptoKit / Security Framework - Attempted to retrieve SecCertificate using SecItemCopyMatching queries, which succeeded on macOS but failed on iOS. let query: [CFString: Any] = [ kSecClass: kSecClassCertificate, kSecReturnRef: true, kSecMatchLimit: kSecMatchLimitAll ] var items: CFTypeRef? let status = SecItemCopyMatching(query as CFDictionary, &items) print("Status: \(status)") // macOS succeeds, iOS fails ExternalAccessory Framework (EAAccessory) * Investigated using EAAccessory and EASession for external token communication, but it did not function as expected. This functionality is critical for my project. Has anyone successfully implemented smartcard-based signing on iOS? Any guidance, sample code, or references to relevant Apple documentation would be greatly appreciated.
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Nov ’25
CoreNFC: NFCTagReaderSession fails with “Session invalidated unexpectedly” (after enabling NFC Scan, paid team, and custom dev profile)
Device: iPhone [model], iOS 18.6.2 Xcode: 16.0.x Team: Individual paid Apple Developer Program (not Personal Team), shows as my full name in Xcode I’m trying to use CoreNFC via NFCTagReaderSession in a small SwiftUI app (part of a larger project). So far I’ve done: • Enrolled in the Apple Developer Program (individual). • Confirmed that in Certificates, Identifiers & Profiles → Identifiers, my App ID for com.<…> has Near Field Communication Tag Reading enabled. • Created an iOS App Development provisioning profile for that App ID, including: • my Apple Development certificate • my iPhone device • Downloaded the profile, double-clicked it, and set it in Xcode under Signing & Capabilities with: • Team = my full-name team • “Automatically manage signing” off, using the custom profile. • Added the NFC Scan capability in Signing & Capabilities. • Added Privacy - NFC Scan Usage Description (NFCReaderUsageDescription) in Info.plist with a non-empty string. The app builds and runs on device. When I start the session: func beginScanning() { print("NFCTagReaderSession.readingAvailable =", NFCTagReaderSession.readingAvailable) session = NFCTagReaderSession(pollingOption: [.iso14443, .iso15693], delegate: self, queue: nil) session?.alertMessage = "Hold your iPhone near your Ori tag." session?.begin() } func tagReaderSession(_ session: NFCTagReaderSession, didInvalidateWithError error: Error) { print("NFC session invalidated:", error.localizedDescription) } readingAvailable is false, and I immediately see: NFC session invalidated: Session invalidated unexpectedly Earlier in this process I was seeing XPC sandbox messages like: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.nfcd.service.corenfc was invalidated: failed at lookup with error 159 - Sandbox restriction." Those went away after I created the explicit iOS App Development profile and pointed the target at it, but the session still invalidates right away and readingAvailable never becomes true. Safari can read NDEF URL tags on this device, so the NFC hardware is working. Question: Is there anything else required on the App ID / provisioning / team side to enable CoreNFC with NFCTagReaderSession for an individual (non-enterprise) developer account? Or any known issues where readingAvailable stays false even with NFC Tag Reading enabled and a custom iOS App Development profile? Any hints on what I might still be missing would be greatly appreciated.
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217
Nov ’25
Misclassifying external medical device.
We have an app that connects to an external device that we developed in-house that measures electroencephalography (EEG), as well as PPG and IMU. This is not a medical device and we have stated that many times but the app review process keeps rejecting the app for the same reason 1.4.1 - Safety physical harm because they say it is connecting to a medical device. We have submitted documentation for FCC certification for safety but we do not have FDA certification because it is not used for medical purposes - purely wellness. Despite several messages explaining it is not a medical device the response is always the same without actually addressing any of the supporting documents we have sent. Any help to find a way to explain to the Apple team that not all EEG devices are medical and in fact most are NOT FDA approved would be appreciated as it seems like whoever is reviewing the app doesn't understand that.
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Nov ’25
Question about SpeechTranscriber availability on specific iPad models
Hello, I am a developer planning to build an application using Apple's new SpeechTranscriber technology. I am facing an issue where SpeechTranscriber is not available on my iPad Pro (11-inch, 2nd generation, model number: MXDC2J/A), even though I have updated it to iPadOS 26. I was under the impression that SpeechTranscriber would be available on any device running iPadOS 26. Could you please clarify if this is incorrect? Furthermore, I am planning to purchase a new iPad with an A16 chip for the development and deployment of this application. Can you confirm if SpeechTranscriber will be fully functional on an iPad equipped with the A16 chip? Thank you for your assistance.
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Nov ’25