Hi everyone, Are there any new updates on communicating with iPhones via USB-C without needing an MFi chip, especially with the iPhone 15 or upcoming iPhone 16? I'm developing a custom accessory and wondering if the switch to USB-C has introduced any new possibilities for data communication without going through the MFi program. Thanks!

I would like to write a driver that supports our custom USB-C connected device, which provides a serial port interface. USBSerialDriverKit looks like the solution I need. Unfortunately, without a decent sample, I'm not sure how to accomplish this. The DriverKit documentation does a good job of telling me what APIs exist but it is very light on semantic information and details about how to use all of these API elements. A function call with five unexplained parameters just is that useful to me. Does anyone have or know of a resource that can help me figure out how to get started?

my carplay is not sinking with iphone after up dating to iOS 18. I have honda ZRV. What is the issue and how to resolve?

Hi everyone. I have an iOS application for work with an MFi-certified device connected to the iPhone via USB-C. When I launch the app and attach the device, I can create an EASession and use the InputStream and OutputStream as usual. But if I attach the device before launching the app I can't use the InputStream and OutputStream, because the hasBytesAvailable and hasSpaceAvailable properties are always false. The NSStreamEventHasBytesAvailable and NSStreamEventHasSpaceAvailable events will never be triggered. After I re-attach the device, the streams open fine and I can interact with the device. What can be wrong with the case of attaching the device before the app launches?

Since updating to 18.0 & 18.1 I’ve have issues with CarPlay connected via usb, phone calls specifically where people would say I sound distant and robotic distortion. Tried other vehicles same issue new usb same issue, tried all recommendations with no success some one who refused to update theirs worked well without any issues I’m currently facing. Any suggestions or there gonna be an update that addresses this issue ?

Hello Currently, we are developing an application that collects measurement data from devices via USB port but we have some problems regarding input buffer size that might reduce the reading speed. The data size is quite big (~1.5 million bytes). For every read action, the app will check the available size in the input buffer by command: ioctl(serialPort.hHandle, FIONREAD, readBuffSize) Then that size will be passed as the desired size for the read command. Between read actions, there will be a short sleep (1 - 3 ms). Please confirm some points below: Regardless of the size of the measure data, the available size will only be up to 1020 bytes, is it expected? Is the above size OS defined or driver defined? Could we increase it? As we checked, there were some missing bytes between the measure data and the actual read data. Is there any chance that the data in the input buffer be overwritten while the read thread is in sleep? Any recommended technique that can increase reading speed while still maintaining the integrity of the data? Tested OS: Sonoma 14.5

Hello, Apple developers. I have joined the MFi certification program. My Accessory to use USB HID IAP2 communication protocol and IOS devices connected, but in the first step, the Accessory to send the following data (0 XFF, 0 x55, 0 x02, 0 x00 to 0 xee, 0 x10) for IOS devices, but the IOS devices have no response, this is probably the reason why?

Hello, We have noted that our USB-C accessory now supplies power and data after a role-switch when it previously would initialize with supplying power to the iOS device, then move to just transferring data to the iOS device after a role-switch. The charging+data behavior is only seen when the accessory is connected to a USB-C based iOS device running iOS 18. Are there some updates in iOS 18 that would cause this behavior? We noted that the expected case occurs with USB-C devices running on the earlier versions (iOS 17 and below).

I am attempting to build a package for distribution. It is not clear how to fix the profile. Can someone point me some documentation that may help me resolve this? Xcode 14 and later requires a DriverKit development profile enabled for iOS and macOS. Visit the developer website to create or download a DriverKit profile.

I'm tryng to develop a software that can connect an iPhone to a HMI Box in order to use CarPlay and test an app for CarPlay. Since the starting point is to ask the device, i.e. the iPhone, if it supports CarPlay, I have to write a USB Vendor-Specific Request that the accessory send to know for this capability. I would like to know what are the specific parameters to include in the control transfer request from accessory to device, especially: bRequest, wValue, wIndex. I've studied the whole Accessory Interface Specification Carplay Addendum, but i couldn't find anything. Thanks in advance for your support.

Hi there, My M1 MacBook Pro recently automatically updated to macOS Sequoia 15.2 Beta, and since then, my LaCie 2big Dock 20TB Hard Drive has not been reading and has been giving me 'Unreadable Volumes'. My LaCie is only a month old and has not moved from its location since I set it up. I have 'run' First Aid on the drive on Disk Utility and it checks out. Is anyone else experiencing this issue and is there a workaround to get it functioning properly again?

I am trying to open the CommunicationControl class IOUSBHostInterface in my USB driver, but it only seems to open on iPad Airs and not iPad Pros. I'm calling ivars->interruptInterface->Open(this, 0, NULL); After retrieving the interruptInterface from the device's InterfaceIterator. I try and open this, but on iPad Pros it returns kIOReturnNotOpen. I've tried closing and reopening the IOUSBHostDevice, closing and reopening the Interface, AbortDeviceRequests before opening, etc. but it just seems to work on iPad Air and not iPad Pro. I've tried on both iPadOS 17.6.1 and 18.2 Has anyone else seen this?

I've asked this question in Stackoverflow, but no response, so I ask for help in here. I follow this guide Debugging and testing system extensions, and try to debug my dext code. In the Attach the debugger to your system extension, it said After your system extension launches, run the ps command-line tool and note your extension’s process ID. This is the current output for my dext status % systemextensionsctl list 1 extension(s) --- com.apple.system_extension.driver_extension enabled active teamID bundleID (version) name [state] * * K3TDMD9Y6B com.accusys.scsidriver (1.0/1) com.accusys.scsidriver [activated enabled] and I used the ps command but nothing happen, I can not get my extension’s process ID. ps aux | grep com.accusys.scsidriver or ps -ef | grep com.accusys.scsidriver How to do that? Any suggestion is appreciated.

Hey, I'currently working on a Driver (and its App) for iPadOS (USB Device). I think have the right entitlements, as my driver gets installed with the app properly (after accepting it in the settings). It also gets loaded once the device is plugged in and so on. However the Kernel is not using the updated Version after I install a new Version of App and Driver to the iPad (at least most of the times). I'm verifying this by reading out the Logs via Console and the Driver prints its Build number on Start(). Sometimes it works like it should but I found no pattern. As far as I understand the iPad should automatically install the new Version of the Driver with the new App if its Build is different from the current one. I'm incrementing the Build of App and Driver automatically post-build so each build the iPad gets has its own Build number (This also works). Steps to reproduce: Cleaning Xcode Build Folder Unplugging the USB Device from the iPad. Building and Installing a new Version of the Driver and the App via Xcode (making sure the build number has changed) Plugging the USB back into the iPad Reading Console output of the iPad However it works (each time if I: Uninstall the app from the iPad manually or via Devices in Xcode Build and install the App via Xcode Open the Settings App and activate the Driver But uninstalling the App each time is taking a lot of time and manual Steps so I would like to fix this issue. Do you have any Ideas? Thanks, Bjarne

Is anyone having any luck getting there phone fixed? I have recently done the iOS 18.1 update and then my phone camera has stopped working. i don’t appear to be on my own either but burnt seeing any positive posts about apple cooperating? not sure how it can be my fault if their software has caused it? I am out of warranty too

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Two apps were built by different teams for the same account. One app disabled the network permission, and the other app could not access the network

i tried opening iMovie for the first time on my 2017 Macbook Air but i get an error saying that iMovie is too new to my mac but i was trying to run the built in one it says i need to downgrade it on the appstore but there is no option to downgrade

I am getting an unexpected crash from IOService::Create() when attempting to create a new user-client. The crash is a nullptr exception in OSCopyInObjects(). The last call from my code was IOService::Create(). As far as I can tell, all the input parameters to Create() are correct, and the Info.plist is has the correct key and class information - indeed, if I corrupt these I get an error status return rather than a crash. Any suggestions as to what could be causing this? I suspect that the problem may be related from a change in the underlying application that is creating the user client. This was modified from a standard app to a daemon, following the advice here: https://developer.apple.com/documentation/xcode/signing-a-daemon-with-a-restricted-entitlement. However, it is the driver that crashes - not the host opening the user client.

Hi there. I inadvertently deleted the Passwords app. The App Store is telling me restrictions are enabled so I can’t reinstall from the cloud. Not sure where to go from here. Help.