Will the External accessory get deprecated, or is it deprecated now?Please reply as the same features are not provided by CoreBluetooth, when connecting with Bluetooth Classic devices.

I'm interested in exploring the idea of connecting an iPhone to a Mac/PC. The initial idea is to allow a computer to access/use the iPhones camera and microphone, but I guess I would also be interested in knowing more about how the communication between an iPhone and Mac/PC could work in a general sense too. There are many posts talking about an iPhone integrating with external hardware devices and MFI is mentioned as well as Redpark cables - but I'm not sure if these same things apply when working with a Mac/PC. So, some questions: What protocols, technologies or frameworks would I use send audio and video from an iPhone and a Mac using a USB cable (if the type of cable matters or makes a difference (ie USB-C vs USB-A), please call it out - but I think it's very likely the type of cable wouldn't make any difference) What protocols, technologies or frameworks would I use to send commands from a Mac to the iPhone using USB so that it can be handled by the iOS app It appears that developers are not able to send raw USB protocol/messages/packets unless the developer is a part of MFI, is that correct? Is there another way to achieve this communication? E.g. with some type of "middle-man" (ie a Redpark cable? some other device?) I've seen iOS applications that turn your phone into a webcam (they usually offer connectivity over USB and over the network (NDI)) - these applications require additional downloads on the Mac/PC. My assumption is that the iOS application is sending messages/packets to the Mac/PC application, and the Mac/PC application is then handling all the work to expose that video/auidio stream as a "camera" device to the system. Would this be the only way to achieve this functionality? Could you expose an iOS application as a camera to a Mac (ignoring PC for now) in a native way, so that it would work the same way it does when you plug in a webcam? Is this possible with MFI alone, or is this possible with a third party device (cable/hardware) in between the iPhone and Mac?

We are developing driver for our USB device. Our approach is to run and test driver on macOS first and then verify on iPadOS 16. In the driver we add custom property -"kUSBSerialNumberString" into default properties: OSDictionary * Driver::devicePropertiesWithSerialNumber() {     kern_return_t ret;     OSDictionary *properties = NULL;     OSDictionary *dictionary = NULL;     OSObjectPtr value;     const IOUSBDeviceDescriptor *deviceDescriptor;     deviceDescriptor = ivars->device->CopyDeviceDescriptor();          ret = CopyProperties(&properties);     value = copyStringAtIndex(deviceDescriptor->iSerialNumber, kIOUSBLanguageIDEnglishUS);     Log("Serial number: %{public}s", ((OSString *)value)->getCStringNoCopy());          dictionary = OSDictionary::withDictionary(properties, 0);     OSSafeReleaseNULL(properties);     if (value) {         OSDictionarySetValue(dictionary, "kUSBSerialNumberString", value);         OSSafeReleaseNULL(value);     }     return  dictionary; } next in kern_return_t IMPL(Driver, Start) we call SetProperties:     ret = SetProperties(devicePropertiesWithSerialNumber());     if(ret != kIOReturnSuccess) {         Log("Start() - Failed to set properties: 0x%08x.", ret);         goto Exit;     } We can read our property on macOS using:     func getDeviceProperty(device: io_object_t, key: String) -> AnyObject? {         IORegistryEntryCreateCFProperty(             device, key as CFString, kCFAllocatorDefault, .zero         )?.takeRetainedValue()     }         if let serialNumber = getDeviceProperty(device: driver, key: "kUSBSerialNumberString") {             print("serialNumber: \(serialNumber)")         } However getDevicePropertyon iPadOS returns nil. We are wondering is any limitation for IORegistry entries(properties) on iPadOS16? Is any way to add custom property to IORegistry? BTW, we added debug method to print all the available properties for IORegistry:     private func debugRegistry(device: io_object_t) {         var dictionary: Unmanaged<CFMutableDictionary>?         IORegistryEntryCreateCFProperties(device, &dictionary, kCFAllocatorDefault, .zero)         if let dictionary = dictionary {             let values = dictionary.takeUnretainedValue()             print(values)         }     } It returns just 1 property for iPadOS: { IOClass = IOUserService; } and much more for macOS including our custom one: { CFBundleIdentifier = "****"; CFBundleIdentifierKernel = "com.apple.kpi.iokit"; IOClass = IOUserService; IOMatchCategory = "***"; IOMatchedPersonality = { CFBundleIdentifier = "****"; CFBundleIdentifierKernel = "com.apple.kpi.iokit"; IOClass = IOUserService; IOMatchCategory = "****"; IOPersonalityPublisher = "****"; IOProviderClass = IOUSBHostInterface; IOResourceMatch = IOKit; IOUserClass = Driver; IOUserServerCDHash = 9cfd03b5c1b90da709ffb1455a053c5d7cdf47ac; IOUserServerName = "*****"; UserClientProperties = { IOClass = IOUserUserClient; IOUserClass = DriverUserClient; }; bConfigurationValue = 1; bInterfaceNumber = 1; bcdDevice = 512; idProduct = XXXXX; idVendor = XXXXX; }; IOPersonalityPublisher = "*****"; IOPowerManagement = { CapabilityFlags = 2; CurrentPowerState = 2; MaxPowerState = 2; }; IOProbeScore = 100000; IOProviderClass = IOUSBHostInterface; IOResourceMatch = IOKit; IOUserClass = Driver; IOUserServerCDHash = 9cfd03b5c1b90da709ffb1455a053c5d7cdf47ac; IOUserServerName = "*****"; UserClientProperties = { IOClass = IOUserUserClient; IOUserClass = DriverUserClient; }; bConfigurationValue = 1; bInterfaceNumber = 1; bcdDevice = 512; idProduct = XXXXX; idVendor = XXXXXX; kUSBSerialNumberString = XXXXXXXXXXX; }

hi, so i have a little bit of work left on the Asus Xonar family of audio devices. thanks to APPUL's samplepciaudiodriver code and their excellent documentation, Evegeny Gavrilov's kxAudio driver for MAC and Takashi Iwai's exceptional documentation of the ALSA API i have something that is ready for testing. the stats look good, but unfortunately i this is my second HDAV1.3 deluxe. the other one is also in the same room consuming all of my devices with powered audio outputs. no matter, i am in the process of acquiring another xonar sound card in this family. which brings me to my question: what is the benefit of getting an apple developer account for 99 dollars a year? will i be able to distribute a beta kext with my signature that will allow people to test the binary? i don't think others could run a self-signed kext built on one machine, on another, correct? so would a developer license allow others to test a binary built on my machine, assuming they're x86? my hope is that the developer program would allow me to test the binaries and solicit input from enthusiast mac pro owners WORLD WIDE. i them hope to create a new program that will give us the wealth mixers/controls this fantastic line is capable of providing.

IOPSCopyPowerSourcesInfo → kIOPSBatteryHealthKey returning incorrect value Background: I write software to monitor computer system health. I'm having problems getting battery health information on my new M2 notebook. Given the following Objective-C program: #include <Foundation/NSObjCRuntime.h> #include <IOKit/ps/IOPSKeys.h> #include <IOKit/ps/IOPowerSources.h> #include <assert.h> int main() { CFTypeRef psInfo = IOPSCopyPowerSourcesInfo(); assert(psInfo != NULL); CFArrayRef list = IOPSCopyPowerSourcesList(psInfo); assert(list != NULL); long count = CFArrayGetCount(list); for(long i = 0; i < count; i++) { CFDictionaryRef ps = IOPSGetPowerSourceDescription( psInfo, CFArrayGetValueAtIndex(list, i)); assert(ps != NULL); CFStringRef deviceName = (CFStringRef)CFDictionaryGetValue( ps, CFSTR(kIOPSNameKey)); assert(deviceName != NULL); CFStringRef serialNumber = (CFStringRef)CFDictionaryGetValue( ps, CFSTR(kIOPSHardwareSerialNumberKey)); assert(serialNumber != NULL); CFStringRef health = (CFStringRef)CFDictionaryGetValue( ps, CFSTR(kIOPSBatteryHealthKey)); assert(health != NULL); NSLog(@"\nName=\"%@\"\nSerialNumber=\"%@\"\n" "BatteryHealth=\"%@\"\n", (__bridge NSString*)deviceName, (__bridge NSString*)serialNumber, (__bridge NSString*)health); } CFRelease(list); CFRelease(psInfo); return 0; } and looking at the IOPSKeys.h header, I expect to get one of "Poor", "Fair", or "Good" for the value of kIOPSBatteryHealthKey. https://opensource.apple.com/source/IOKitUser/IOKitUser-1845.81.1/ps.subproj/IOPSKeys.h.auto.html Instead, on my 2022 M2 Macbook Air running 13.2.1 (22D68), I get the following output: Name="InternalBattery-0" SerialNumber="F8Y2422145S10X2A7" BatteryHealth="Check Battery" At the same time, the "System Information app says "Condition: Normal". Am I missing something? This seems to be a bug, right? Should I look into filing a Technical Support Incident?

Hello, I am trying to run a sample project from Apple's Developer Documentation that creates and interfaces with a DriverKit Dext. The project can be found here: Creating an Audio Device Driver. I have followed all the steps in the README.md file: downloading the code, enabling automatic signing, building the app, moving it to the Applications folder, and launching it. I then open the app, press "Install Dext", enable it through System Preferences, and receive the message "SoundboardDriver has been activated and is ready to use." However, the audio device does not appear in the MIDI app, there is no mention of it in the IORegistry, and I get the message “Driver extension is not running” when I try to press "Open User Client". Is there another step I need to follow to get the app running? Perhaps it's an entitlement issue? I don't see any error/fault message in the console app relating to the app or driver. I am running MacOS 13.4.1 (22F82) and Xcode 14.3.1 (14E300c). I have tried with and without SIP enabled, but the issue persists. Any help or guidance would be greatly appreciated. Best, Henry

In Apple Developer Documentation / DriverKit, Notes that "The base DriverKit framework is available ... and iPadOS for devices with an M1 processor.", There is no mention of the M2 and subsequent Apple Silicon chipsets, Does DriverKit work on iPads with M2 and subsequent Apple Silicon chipsets? Apple Developer Documentation / DriverKit : https://developer.apple.com/documentation/driverkit

Hi everyone, I am fairly new to Apple development. I have been working on a project where I need Mac to interface with an HID device (custom device). I have successfully communicated with the device using IOKit, Core Foundation and Driver Kit frameworks by simply importing these frameworks in the project and making use of their APIs. However, my client is now asking that I develop the communication explicitly using HID Driver Kit. Bear in mind that I have not purchased the apple developer certificate nor do I have any provisional signing certificates and without any of these, Xcode was allowing me to use frameworks like IOKit, DriverKit etc. Now, when I tried importing HIDDriverKit into the project, I am not able to find this framework in the "Frameworks and Libraries" tab. How do I import this framework into my project? Do I have to purchase apple developer ID or get the provisional signing certificates or any other formalities are required? Please let me know what can be done. Any pointers or suggestions are welcome. Best, Vishnu

Hello, I try to get notifications when the display is turned off (not the screensaver). I've tried the following code (part of it), but it don't work at all (the callback is never called).. I don't get where I did something wrong. Any help or relevant documentation link would be very appreciated .. Thank, volfo io_object_t disp_notifierObject; void* disp_refCon = NULL; kern_return_t disp_registerCode; notifyPortRef = IONotificationPortCreate(kIOMainPortDefault); display_wrangler = IOServiceGetMatchingService( kIOMainPortDefault, IOServiceNameMatching("IODisplayWrangler")); // register to receive display sleep notifications disp_registerCode = IOServiceAddInterestNotification( notifyPortRef, display_wrangler, kIOGeneralInterest, CBDisplaySleep, NULL, &disp_notifierObject); if ( disp_registerCode != kIOReturnSuccess ) { printf("IOServiceAddInterestNotification failed\n"); return 2; } CFRunLoopAddSource( CFRunLoopGetCurrent(), IONotificationPortGetRunLoopSource(notifyPortRef), kCFRunLoopCommonModes ); IOObjectRelease (display_wrangler);

macOS, really, so there are a bunch of things that may be running during various types of sleep. I know I can get notifications from IOKit about the system going to sleep or waking up, but if I've got a daemon that crashed, and is then relaunched automatically, can I tell whether the machine is awake, or in some sort of sleep state other than hibernation?

Using IOHIDManagerCopyDevices to get a list of keyboards and mice attached to Mac, triggers the user facing "Input Monitoring" request. Because I'm NOT monitoring the users input, the result of the user selection makes no difference to the result, but the privacy warning dialog makes my app look suspicious. All it is doing is checking to make sure that the customer has a non-Bluetooth keyboard or mouse, before they click the button to disable Bluetooth. Is there a way a safe way (no private API please) to enumerate HID devices without this warning, or should I file a feedback asking Apple to reconsider what triggers this dialog?

Hi, currently I have a project to develop a customized iOS/iPadOS app that is expected to can connect and communicate an External Cameras to iPhone/iPad device through USB Connection. The app should be able to access the taken photo from the External Cameras and/or take a shot executed by the app. The external camera manufacturers are like Canon, Nikon, and Sony. As references, there are some apps that have that capability above released in Appstore: https://apps.apple.com/us/app/camera-connect-control/id1457548017 https://apps.apple.com/id/app/image-capture-go/id1606632530?platform=iphone As far as I know, I can connect to the Camera by using External Accessory framework provided by Apple as long the external device is MFi program supported and I have the detail of command protocol of the the device used. In my case, Canon Camera is listed as MFi device in https://mfi.apple.com/account/accessory-search. But I don't have the detailed command protocol of the device to communicate with. Questions: Is my understanding related External Accessory framework correct? How to connect and communicate external camera to iPhone/iPad via USB by using External Accessory framework? Is there any other work around to do the things like the reference apps in Appstore above? Thank you very much.

Hello, I get the following error while compiling software, which is related to Apple libs. /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk/usr/include/c++/v1/__memory/unique_ptr.h:173:32: error: member 'nullptr_t' declared as a template _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : _ptr(__value_init_tag(), __value_init_tag()) {} What should I do?

Dear Sirs, I’d like to write a virtual audio driver that also exchanges data with a application and thus probably also offers a driver extension using IOUserClient. My first implementation was based on the sample https://developer.apple.com/documentation/audiodriverkit/creating_an_audio_device_driver and everything works fine and as expected on my development machine and I can install/uninstall the dext from within my application. But I had to learn that I will not be given the required entitlement com.apple.developer.driverkit.family.audio as AudioDriverKit seems to be not intended to be used for virtual drivers. So I found out that this sample should be used as starting point for virtual audio drivers: https://developer.apple.com/documentation/coreaudio/creating_an_audio_server_driver_plug-in. But this sample does not include a dext offering the IOUserClient interface which I think I need. The next sample I found was https://developer.apple.com/documentation/coreaudio/building_an_audio_server_plug-in_and_driver_extension . This doesn’t use AudioDriverKit and it includes IOUserClient so it seems to be a good start. Nevertheless it also requires some entitlements which are com.apple.developer.driverkit and com.apple.developer.driverkit.transport.usb. The client also probably needs the entitlement com.apple.developer.driverkit.userclient-access. Would I be given these entitlements for a pure virtual audio driver and why would I need com.apple.developer.driverkit.transport.usb? And is there a chance that AudioDriverKit will also be opened for virtual drivers as it seems to be a much more modern approach and doesn’t require a reboot for installing? Thanks and best regards, Johannes

Dear Sirs, I've written a driver extension that can be configured through a user mode application. Now when the system reboots I'd like to start the dext again with the latest configuration right from the beginning and before the user mode applications is started (if it is started at all). What is the recommended way to do this and is there an example available? Should I do this using configuration files and through a special file API inside the dext or is there a kind of registry, or should I use sysctl variables and sysctlbyname? Thanks and best regards, Johannes