I have an iOS/iPadOS app and 'm trying to communicate with usb smart card reader using CryptoTokenKit on all platforms (ios/ipados/macos). Minimal Repro Code import CryptoTokenKit import SwiftUI struct ContentView: View { @State var status = "" var body: some View { VStack { Text("Status: \(status)") } .padding() .onAppear { let manager = TKSmartCardSlotManager.default if manager != nil { status = "Initialized" } else { status = "Unsupported" } } } } And my entitlement file has only one key: com.apple.security.smartcard = YES Behavior • iPadOS (on device): status = "Initialized" ✅ • macOS (native macOS app, with the required CryptoTokenKit entitlement): status = "Initialized" ✅ • macOS (Designed for iPad, regardless of CryptoTokenKit entitlement): status = "Unsupported" → TKSmartCardSlotManager.default is nil ❌ Expectation Given that the same iPadOS build initializes TKSmartCardSlotManager, I expected the iPad app running in Designed for iPad mode on Apple silicon Mac to behave the same (or to have a documented limitation). Questions Is CryptoTokenKit (and specifically TKSmartCardSlotManager) supported for iPad apps running on Mac in Designed for iPad mode? If support exists, what entitlements / capabilities are required for USB smart-card access in this configuration? If not supported, is Mac Catalyst the correct/only path on macOS to access USB smart-card readers via CryptoTokenKit? Are there recommended alternatives for iPad apps on Mac (Designed for iPad) to communicate with USB smart-card readers (e.g., ExternalAccessory, DriverKit, etc.), or is this scenario intentionally unsupported? Thanks!

I have poked around the web looking for a good example to do this and I haven't found a working example. I need to connect to a USB Device, its multiple ports and supports what looks to be a root port and 4 other ports I am no expert in USB but I do know how to write a kext and client drivers, but thats really not the way to solve this. I need to display the serialized output from these USB ports for a development board. I would rather do this on my Mac than have to cobble up a Linux machine and mess around with Linux. Here is the output from ioreg MCHP-Debug@03100000 <class IOUSBHostDevice, id 0x105f6fdc2, registered, matched, active, busy 0 (20 ms), retain 27> MCHP-Debug@0 <class IOUSBHostInterface, id 0x105f6fdc8, registered, matched, active, busy 0 (13 ms), retain 5> +-o MCHP-Debug@0 <class IOUSBHostInterface, id 0x105f6fdc8, registered, matched, active, busy 0 (13 ms), retain 5> +-o MCHP-Debug@1 <class IOUSBHostInterface, id 0x105f6fdc9, registered, matched, active, busy 0 (11 ms), retain 5> +-o MCHP-Debug@2 <class IOUSBHostInterface, id 0x105f6fdcb, registered, matched, active, busy 0 (9 ms), retain 5> | | | | | +-o MCHP-Debug@3 <class IOUSBHostInterface, id 0x105f6fdcc, registered, matched, active, busy 0 (7 ms), retain 5> I have been able to open a inservice to the device at the top level, but I get an error when I use. usbHostInterface = [[IOUSBHostInterface alloc] initWithIOService:usbDevice options: IOUSBHostObjectInitOptionsNone queue: queue error: &error interestHandler: handler]; Error:Failed to create IOUSBHostInterface. with reason: Unable to obtain configuration descriptor. Assertion failed: (usbHostInterface), function main, file main.m, line 87. I started using DeviceKit but I received signing errors and I shouldn't have to go down that path just to dump data from a USB port? Any suggestions would be great, most of the Apple documentation on USB ports is like 20 years old and the new stuff pushes you towards DeviceKit.

Hello, We are developing an iAP2 accessory and encountering an issue during the Identification phase. Issue: Authentication: ✅ Successful Identification: ❌ IdentificationInformation rejected (0x1D03) Product Plan Status: "Submitted" (in MFi Portal) What we've verified: ProductPlanUID matches MFi Portal All required parameters per R43 Table 101-9 are included Parameters are in ascending order by ID Message format appears correct Observation: iPhone accepts the message format but still rejects IdentificationInformation, suggesting the issue may be related to Product Plan configuration or status rather than parameter format. Questions: Can a Product Plan with status "Submitted" complete iAP2 identification, or does it need to be "Approved"? Are there any Product Plan configuration requirements that might not be visible in MFi Portal? Should we configure "Control Message Lists" in Product Plan? (We don't see this option in Portal) We can provide additional technical details through secure channels if needed. Thank you for your assistance.

Hi everyone, I am seeking clarification regarding the communication capabilities between an ESP32 microcontroller and Apple's latest devices, specifically the iPhone 16 Pro Max and iPad Pro, both equipped with USB-C ports. Background: MFi Certification: Historically, establishing communication between external devices and iOS devices required MFi (Made for iPhone/iPad) certification. But I remember this being necessary in the Lightning Cable to USB era. With the introduction of USB-C ports in recent iPhone and iPad models, there is an indication that MFi certification may no longer be necessary for certain peripherals. Perhaps I'm not confident on the terminology here: https://mfi.apple.com/en/who-should-join Project Requirements: I am working on a sensor research project that necessitates the collection of low-latency time-series data from an ESP32 microcontroller, which features a USB-C port. The data needs to be transmitted to an iPhone 16 Pro Max or iPad Pro. Bluetooth communication has proven insufficient due to its limited data transfer rates (~1.2 Mbps with L2CAP). While NEHotspot could be an alternative, it restricts the iPad's internet connectivity. Therefore, establishing a direct USB-C connection between the ESP32 and the iOS device appears to be the most viable solution. Questions: MFi Certification Necessity: Is MFi certification still required for an ESP32 microcontroller to communicate with iPhone 16 Pro Max or iPad Pro via USB-C? USB-C Communication Support: Do the iPhone 16 Pro Max and iPad Pro natively support serial communication over USB-C with microcontrollers like the ESP32? If not, are there recommended protocols or interfaces to facilitate this communication? App Development Considerations: Would developing a custom iOS application be necessary to handle data transmission from the ESP32 over USB-C? If so, are there specific APIs or frameworks provided by Apple to support this functionality? Data Transfer Rates: Considering the need for high-speed data transfer, are there any limitations or considerations regarding the data transfer rates achievable through a USB-C connection between the ESP32 and iOS devices? Thank you!

I am developing a virtual Bluetooth HID keyboard device on my Win desktop that connects to my iPad over bluetooth and advertises itself as a keyboard to control the iPad. It works very well already on Android, but not on iOS. I can see in Packet Logger that it reads well as a HID device, reads the report map and HID information correctly, which data is all valid. It doesn't subscribe to the report's Client Characteristic Configuration, just silently quitting and the keyboard does not work. I can post more information if needed, but my question in short is what are the requirements for iOS to accept a HID over GATT as a keyboard peripheral. I feel like I am close.

Background Information In the macOS operating system environment, Program A uses libusb to access USB devices that comply with the USB Mass Storage protocol. To enable Program A to start automatically after macOS boots, its corresponding plist file has been placed in the /Library/LaunchDaemons directory. Problem and Phenomenon Description Program A works well on macOS versions prior to 15.3, and it can access USB devices normally. However, on macOS 15.3, the following abnormal situations have occurred: A. Program A launched by launchd cannot access the USB device. Checking the logs reveals that the IOCreatePlugInInterfaceForService call in the darwin_claim_interface function returns the error code e00002be. B. Program A launched from the terminal command line with sudo privileges can access the USB device normally, and the return value of the IOCreatePlugInInterfaceForService call is 0.

Hi, as other threads have already discussed, I'd like to record audio from a keyboard extension. The keyboard has been granted both full access and microphone access. Nonetheless whenever I attempt to start a recording from my keyboard, it fails to start with the following error: Recording failed to start: Error Domain=com.apple.coreaudio.avfaudio Code=561145187 "(null)" UserInfo={failed call=err = PerformCommand(*ioNode, kAUStartIO, NULL, 0)} This is the code I am using: import Foundation import AVFoundation protocol AudioRecordingServiceDelegate: AnyObject { func audioRecordingDidStart() func audioRecordingDidStop(withAudioData: Data?) func audioRecordingPermissionDenied() } class AudioRecordingService { weak var delegate: AudioRecordingServiceDelegate? private var audioEngine: AVAudioEngine? private var audioSession: AVAudioSession? private var isRecording = false private var audioData = Data() private let targetFormat = AVAudioFormat(commonFormat: .pcmFormatInt16, sampleRate: 16000, channels: 1, interleaved: false)! private func setupAudioSession() throws { let session = AVAudioSession.sharedInstance() try session.setCategory(.playAndRecord, mode: .spokenAudio, options: [.mixWithOthers, .allowBluetooth, .defaultToSpeaker]) try session.setPreferredIOBufferDuration(0.005) try session.setActive(true, options: .notifyOthersOnDeactivation) audioSession = session } func checkMicrophonePermission(completion: @escaping (Bool) -> Void) { switch AVAudioApplication.shared.recordPermission { case .granted: completion(true) case .denied: delegate?.audioRecordingPermissionDenied() completion(false) case .undetermined: AVAudioApplication.requestRecordPermission { [weak self] granted in if !granted { self?.delegate?.audioRecordingPermissionDenied() } completion(granted) } @unknown default: delegate?.audioRecordingPermissionDenied() completion(false) } } func toggleRecording() { if isRecording { stopRecording() } else { checkMicrophonePermission { [weak self] granted in if granted { self?.startRecording() } } } } private func startRecording() { guard !isRecording else { return } do { try setupAudioSession() audioEngine = AVAudioEngine() guard let engine = audioEngine else { return } let inputNode = engine.inputNode let inputFormat = inputNode.inputFormat(forBus: 0) audioData.removeAll() guard let converter = AVAudioConverter(from: inputFormat, to: targetFormat) else { print("Failed to create audio converter") return } inputNode.installTap(onBus: 0, bufferSize: 1024, format: inputFormat) { [weak self] buffer, _ in guard let self = self else { return } let frameCount = AVAudioFrameCount(Double(buffer.frameLength) * 16000.0 / buffer.format.sampleRate) guard let outputBuffer = AVAudioPCMBuffer(pcmFormat: self.targetFormat, frameCapacity: frameCount) else { return } outputBuffer.frameLength = frameCount var error: NSError? converter.convert(to: outputBuffer, error: &error) { _, outStatus in outStatus.pointee = .haveData return buffer } if error == nil, let channelData = outputBuffer.int16ChannelData { let dataLength = Int(outputBuffer.frameLength) * 2 let data = Data(bytes: channelData.pointee, count: dataLength) self.audioData.append(data) } } engine.prepare() try engine.start() isRecording = true delegate?.audioRecordingDidStart() } catch { print("Recording failed to start: \(error)") stopRecording() } } private func stopRecording() { audioEngine?.inputNode.removeTap(onBus: 0) audioEngine?.stop() isRecording = false let finalData = audioData audioData.removeAll() delegate?.audioRecordingDidStop(withAudioData: finalData) try? audioSession?.setActive(false, options: .notifyOthersOnDeactivation) } deinit { if isRecording { stopRecording() } } } Granting the deprecated "Inter-App Audio" capability did not solve the problem either. Is recording audio from a keyboard extension even possible in general? If so, how do I fix it? Related threads: https://developer.apple.com/forums/thread/108055 https://developer.apple.com/forums/thread/742601

Our company is developing an MFi headset with a button that we would like to use for initiating PTT. We can detect the button press and initiate PTT successfully, even when the app is not in the foreground, using the ExternalAccessory framework. But I wonder if this is a coincidence, or a scenario that should reliably work with Push to Talk?

My iPhone 16 pro max when on the magnetic charger at home or in my car. My phone just powers down and reboots on its own. This has happened several times a day since updating to iOS 18.4. Anyone else having this problem ?

I am developing the electronic part of product, it includes a Find-My features. I saw some forum that testing Find-My feature needs a CSR and testing token. Can anyone teach me how to apply CSR and testing token step by step? Thank you very much. Best regards Sam Ng

Hi, We are developing a Matter switch product. The switch contains 4 buttons, and each button supports click, double click, and held actions. Currently, the device can be successfully commissioned with a HomePod mini, and in the Apple Home app, it is displayed as 4 buttons with options for click, double click, and held for each. The only issue is that the order of the 4 buttons in the Home app does not correspond to the endpoint order (endpoint 1–4). For example, the following mapping might occur: endpoint 1 → button 2 endpoint 2 → button 3 ... We found a related issue on the Apple Developer Forums that matches what we're experiencing: https://developer.apple.com/forums/thread/772367?utm_source=chatgpt.com According to the official response, the problem seems to be caused by insufficient metadata being reported by the device. Could you please provide more specific guidance on what exact information needs to be reported from the device side? We have already tried adding the Fixed Label and User Label clusters to the device, but they don't seem to have any effect. Ideally, we would like the button labels in the Home app add our custom names in the correct order, as below: button 1 (right_button) button 2 (up_button) button 3 (down_button) button 4 (left_button) This would provide a much better user experience. Thank you in advance!

HomePod Mini running 18.6 build 22M5054/b - will not update to HomePod OS26 have tried un-enrollment, reset, removal, etc - no dice - anyone else seeing this ? Any known work arounds ? iPad is running iPadOS 26 Relase 2 - 23A5276f

I am writing to report an issue I’m facing after updating my iPhone 11 Pro Max to iOS 26. I have been using the Hollyland Lark M2 external microphone via the Lightning port, and it was working perfectly before the update. However, after upgrading to iOS 26, the iPhone no longer detects it correctly. The device now recognizes the mic as a pair of wired earphones, and it fails to capture any audio input. The microphone itself works flawlessly on other devices, so this appears to be an iOS-specific issue. Could you please confirm: • Whether this is a known issue in iOS 26? • If there are any settings or steps I can take to resolve this? • Whether a fix is planned in an upcoming iOS patch? I would appreciate any guidance or solution you can provide. Thank you for your support.

Hi there! I'm developing a dual-mode bluetooth accessory and would like to pair it through AccessorySetupKit. I'm using an ESP32 with Bluekitchen btstack. This supports CTKD, which seems to be a requirement for the Bluetooth transport bridging according the WWDC19 session 901. I've been in contact with the btstack developer and verified that I can get the device to generate an LTK for the classic transport when reading an encrypted attribute. I'm not able to get this to work with the bluetoothTransportBriding option with AccessorySetupKit though. What I've found so far is that if I omit the .bluetoothTransportBriding option during pairing I will get a pairing request when I read an encrypted attribute after connecting with the CBConnectPeripheralOptionEnableTransportBridgingKey option. If I accept this request it seems like the system automatically brings up the A2DP profile. However if I include .bluetoothTransportBriding and/or .bluetoothPairingLE this option does not pop up, but the system does not bring up the A2DP profile. In this case things seem to end up in a weird situation where the device doesn't show up for pairing in Bluetooth Settings either, making it impossible to manually connect for A2DP. Based on the AccessorySetupKit example from WWDC24 I've created a dice accessory firmware for ESP32 using btstack. The code for this is available here: https://github.com/ljodal/esp32-btstack-ctkd-test I've also tweaked the AccessorySetupKit example app for iOS to add the ASAccessory.SupportOptions. The code for that is available here: https://github.com/ljodal/accessorysetupkit-ctkd-test Is there any documentation available anywhere on what is expected of the device for Bluetooth Transport Bridging to work with AccessorySetupKit?

Macbook pro M4 - will not accept any power adapter after beta update iPhone 16 pro - same exact problem Devices are dead Tried multiple chargers - Watch and IPad appear to be taking a charge for now..

Hello Apple team and community, I’m reporting a critical issue affecting iPhone 13 (128 GB) on iOS 26 Public Beta 3. Problem Summary: • Device stays stuck at 1% battery, even while charging • Battery Health shows 0% in Settings • Phone reboots every 5 minutes while unplugged • Only works when connected to power • Cannot update, charge properly, or maintain uptime Additional Context: • The issue appeared immediately after installing iOS 26 beta 3 • Affected devices often have a replaced battery (even official or high-quality replacements) • Seems to be a software validation bug related to battery firmware • Reported by many users across Reddit, Apple Forums, and Twitter — but not listed in Known Issues What Has Been Tried: • Recovery Mode / Safe charging / Clean install (same version) – no effect • Third-party repair tools (ReiBoot, 3uTools) — partial workaround • Jailbreak with Nugget or iCleaner to disable crash daemons – temporarily helps • Apple Support suggested full device replacement (!) ⸻ Request: Please investigate and acknowledge this issue. This bug renders devices unusable for users with legitimate battery replacements — we need a fix in an upcoming beta.

Hi everyone, while testing HKWorkoutSession with HKLiveWorkoutBuilder on iOS 26 Beta (cycling workout), I noticed the following behavior: – Starting a cycling HKWorkoutSession automatically connects to my Bluetooth heart rate monitor and records HR into HealthKit ✅ – However, my Bluetooth cycling power meter and cadence sensor (standard BLE Cycling Power & CSC services) are not connected automatically, and no data is recorded into HealthKit ❌ On Apple Watch, when starting a cycling workout, these sensors do connect automatically and their data is written to HealthKit — which is exactly what I would expect on iOS as well. Question: Is this by design, or is support for power and cadence sensors planned for iOS in the same way as on watchOS? Or do we, as developers, need to implement the BLE Cycling Power and CSC profiles ourselves (via CoreBluetooth) if we want these metrics? Environment: – iOS 26 Beta – HKWorkoutSession & HKLiveWorkoutBuilder (cycling) – Bluetooth HRM connects automatically – BLE power & cadence sensors do not This feature would make it much easier to develop cycling apps with full HealthKit integration, and also create a more consistent user experience compared to watchOS. Thanks for any insights!

I am working on an app that requires the usage of CoreBluetooth – using both its CBPeripheralManager and CBCentralManager classes. Our app works with other phones and hardware peripherals to exchange data – so we wanted to explore adding AccessorySetupKit to streamline the hardware connection process. AccessorySetupKit has been integrated (while CBPeripheralManager is turned off) and works great, but even with ASK added to our app's plist file and not in use, CBPeripheralManager fails with error: Cannot create a CBPeripheralManager while using AccessorySetupKit framework. Is there any workaround or suggested path forward here? We'd still really like to use ASK while keeping our existing functionality, but are not seeing a clear way to do so.

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.

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.