When plugging in my matched USB device I see the logs below. It seems the kernelmanagerd process is sandboxed and can't write out the reason my Dext failed to load. Is there somewhere else I can look for this info? default 11:03:22.175152-0700 kernelmanagerd Received kext load notification: me.keithg.MyUserUSBInterfaceDriver default 11:03:22.177637-0700 kernel 1 duplicate report for Sandbox: icdd(2124) allow file-read-data /Library/Image Capture/Devices error 11:03:22.177681-0700 kernel Sandbox: kernelmanagerd(545) deny(1) file-write-create /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/com.apple.kernelmanagerd/TemporaryItems com.apple.libcoreservices error 11:03:22.177711-0700 kernelmanagerd mkdir: path=/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/com.apple.kernelmanagerd/TemporaryItems/ mode= -rwx------: [1: Operation not permitted] error 11:03:22.179361-0700 kernel Sandbox: kernelmanagerd(545) deny(1) file-write-create /private/var/db/loadedkextmt.plist.sb-5a00fc77-LNttZF com.apple.libcoreservices error 11:03:22.177755-0700 kernelmanagerd _dirhelper_relative_internal: error for path <private>: [1: Operation not permitted] com.apple.accessories default 11:03:22.177674-0700 WindowServer Sending analytics event... (eventName: com.apple.ioport.transport.USB.published) error 11:03:22.179913-0700 kernelmanagerd Failed to write extension load report plist.

We have a macOS application which interacts with our USB and PCI devices to perform SCSI and NVME commands on them. We use IOUSBHost, IOUSBLib and IOKitLib for USB interface and have created a custom driver to interact with PCI devices. Is there a way we can implement a similar functionality for iOS as well if we connect the cards and readers using OTG?

Hi Apple support, We requested the 4 HID-related Entitlements back in December 2024. Similarly to another post here in the forums that was completely ignored, our request has NOT been processed for months. Mailing the support staff results in boilerplate email responses with no content, calling them results in a chat with very nice people who are unable to help since they can't seem to reach the entitlement team directly. Having to wait for MONTHS when dealing with one of the biggest and supposedly best companies in the world is beyond disappointing. Can anyone help? Is there anyone else that has had this same issue and that has found a work-around? I can share all necessary details. Thanks, Matteo

When I develop the system extension tool, I need to subscribe to the remote thread creation event. When the remote thread injection is triggered, I want to get the id, module name and starting function name of the remote thread. How can I get this information from es_event_remote_thread_create_t? If I can't get this information from es_event_remote_thread_create_t, is there any other way to get it?

Hi Everyone! I want to block the USB wired mouse from accessing my machine. Which framework is used to implement ? PS: I have already tried DriverKit Framework but it requires Apple's paid developer account. What will be alternative ?

Hello, I recently created an app with the Calldirectory Extension. It worked all good as long as I was on my development iphone. I tried to install the app on my privat iphone (same phone/same os version), but then I faced an issue. I couldn't enable the Calldirectory Extension with an error (Error Enabling Extension Failed to request data for APPNAME. You may try enabling the extension again, and if the problem persists, conatact the application developer.)

Since updating to iOS18.4.1, I can no longer remove Waze from operating in Carplay. It was working perfectly prior to this update where I could view the Waze map on my iPhone 12 Pro, rather than the Carplay map. I prefer to use my iPhone map rather than the Carplay map. Now as soon as I open Waze, despite my having customized and removing it from the Carplay list, while the icon is removed, it continues to open in Carplay! Help! I cannot use Waze using the Carplay maps! Anyone have a solution?

Hello everyone I have been developing PCIe device driver through Thunderbolt. However, it was confirmed that up to three devices connected to the daisy chain worked normally, but the fourth device failed to operate the _CopyDeviceMemoryWithIndex() function for connection with the BAR0 App and did not work properly. The standard specification of Thunderbolt 3/4 is said to be supported by daisy chain connection up to 6 units, but in reality, it is only 3 units, so I ask the forum for technical confirmation. Of course total 4 device by 2-port x 2-device daisy chain connecting has working well. And the PCI entry in System information app indicates that all devices have normal load of the PCIe device driver.

Hello all, I am interested in developing a small driver that would facilitate host-to-host communication via Thunderbolt 4/5. While I am aware of features such as Thunderbolt Bridge/Thunderbolt Networking, I find that for my application the overhead is too great. I am interested in sharing a simple, static memory buffer between the two hosts for IO and with some synchronisation primitives. The idea being that the communication is facilitated between different platforms. Would it be possible to develop a driver/service like this? Currently, going through the documentation, to use PCIDriverKit specifying a Vendor and Product Ids is required, so I doubt that this is a viable path. I know that Linux exposes the "XDomain" protocol to announce thunderbolt services (This is the same protocol that is used in macOS to discover Thunderbolt Networking peers). Is this functionality exposed to macOS driver developers?

We submitted a request a couple years ago to Apple through the feedback system to add 1 custom vid/pid to the com.apple.DriverKit-AppleUSBFTDI driver. They added it to Monterey and it appears in all macOS versions since Monterey. Not long after submitting this request, we sent a follow-up request to add 2 more pids (same vid, and same personality). Apple eventually added these as well. They appear as an array of pids under the same personality. We are 2 weeks from releasing one of those products (added in the second request) and are just now realizing that the second request was only honored on Sequoia (this fact was masked by us using a temporary ftdi vid/pid during development while waiting for Microsoft to resolve an issue related to adding custom vid/pids to FTDI's Windows driver). All other versions that we are supposed to support (Monterey thru Sonoma) only have the first device. None of the devices from the second request are listed, and consequently this device doesn't match and doesn't expose as a serial port as it should. Our application that works with these devices supports Monterey and up, and we desperately need all devices that we have submitted so far to be available on Monterey and up (thru system updates). I tried starting a code-level support ticket, but they don't have a category for this problem. The feedback mechanism is a black box. You submit the request and get no response. You just wait for weeks/months and then it just appears one day. That was fine then, but we're now in an emergency situation. (FTDI's own dext driver, last time we tried it at least, was unable to be installed after being customized, and they admitted to us during email support that there was some issue on the Apple side that was preventing it from being customized. They haven't updated the dext driver since then, so I assume the situation is still the same) What can we do?

I'm trying to implement a custom back button in a CPInformationTemplate using CPBarButton. It works as expected on iOS 18 — the button appears in the navigation bar and correctly pops the template when tapped. However, on iOS 16 devices, the custom back button does not respond to taps at all. The reason I need a custom back button is because I want to perform cleanup and reset logic before popping the template. Is there any workaround for making this work on iOS 16? Or is there a recommended way to hook into the system back button behavior so that I can execute code when the template is dismissed?

I'm using CPListItem like this: CPListItem( text: "test", detailText: "test", image: nil, accessoryImage: nil, accessoryType: .none ) However, when I tap the item in the list, a loading indicator appears on the right side, as shown in the image I attached. I didn’t configure anything that should cause this behavior. Why is the loading indicator shown by default when tapping a list item? Is there a way to prevent it from appearing?

On iOS17, UIDevice.current.batteryLevel is returning values rounded to 0.05, such as 1, 0.95, 0.9.

My 2025 Hyundai Tucson SEL was doing fine with Apple CarPlay until last night's update, now it refuses to see/use CarPlay, both by bluetooth and by cable. Mind you, was working perfectly fine yesterday, it still sees my wife's phone via bluetooth and my son's phone via cable. The Tucson's last over-the-air update was 5/23/25, as in, nothing has changed with the Tucson, or my other family phones, which leaves only one variable that changed, my iPhone updating to the latest iOS developer beta.

Hello, I need to develop an application for a customer who is using an iPad. This application needs to read from and send data to a custom HID device connected via USB-C. Using USBDriverKit, the HID device can be detected when plugged into the iPad. However, when trying to open the device with the following code: ivars->interface = OSDynamicCast(IOUSBHostInterface, provider); ret = ivars->interface->Open(this, 0, NULL); It only returns e00002cd. I would like to ask if it is possible to access a custom HID device on iPadOS using USBDriverkit? Any help would be greatly appreciated!!

Hello everyone, We're working on an iOS app that needs to connect to a non-Apple pre-operating system using USB for serial communication. Our goal is to send and receive data between an iPhone and a UEFI-based system directly over USB. We've created a proof of concept using the USBMux protocol, which let us exchange basic messages. However, we're running into problems with the USB endpoint setup. In some cases, the USB communication doesn't start or stay connected. Since this is for a pre-boot environment, it might not fit into the usual iOS USB communication frameworks. We're looking for help with the following: Any guidance or documentation on setting up USB serial communication between an iPhone and a non-Apple pre-boot system Information on system APIs, frameworks, or protocols that iOS supports for direct USB communication in this scenario Access to official USBMux documentation or specs to understand its limitations and capabilities better Whether this communication requires MFi certification or if there are other Apple-supported interfaces we can use Thank you!

Hello. have zero by mar air, plan to learn xcode and swift, have to plaay on my local computer with Endpoint Security, is it really that i cannot do it without have dev id and pay 100$? thanks

I'm developing a CarPlay app and encountered an inconsistent behavior with template detection. When I present a CPActionSheetTemplate and then print the presentedTemplate property, it returns nil. However, when I present a CPAlertTemplate, the presentedTemplate property correctly returns the template object. This inconsistency is causing issues in my app where I need to check if there's already a presented template before showing another one to avoid conflicts. Why does CPActionSheetTemplate not get detected in presentedTemplate while CPAlertTemplate does? Is this intended behavior or a bug? Any guidance on how to properly detect if a CPActionSheetTemplate is currently presented would be greatly appreciated.

After some experimentation with copying multiple DriverKit SDKs into /Applications/Xcode.app/Contents/Developer/Platforms/DriverKit.platform/Developer/SDKs/DriverKit, it's become clear that Xcode only supports the DriverKit version that ships with it. There is no way to configure an alternative SDK within a project and changing to a different one results in strange build warnings and errors. This begs the question - how are developers supposed to develop and support dexts? Here's one example scenario: SCSIDriverKit introduced a breaking change in DriverKit 24.4 (macOS 15.4 and Xcode 16.3) due to a new feature. Once a dext is built against that kit, it will not function on macOS 15.0-15.3 whether that feature is implemented or not. We found a similar thing with NetworkingDriverKit as well. So, over the course of maintaining a Sequoia product while working in Sequoia itself, simply updating Xcode breaks the product. Not to mention trying to maintain a Sequoia product in Tahoe when it is released. How is this a good developer experience? Are developers resigned to having a myriad of Xcode versions which may require booting into multiple macOS versions to use? That would in turn produce a myriad of product versions that would need to be deciphered by the user or an installer? Shouldn't developers be able to use the latest tooling while still being able to produce products for OSes that are just a year or two old? Or should DriverKit files be conditionalized so configuring a deployment version in Xcode actually builds the right thing even with the latest SDK? I just don't get it. Help me understand. Replacing kexts with dexts seems like a development nightmare.

I’m creating my first DriverKit extension and I ran into an entitlement issue when trying to load my driver. Error 0x0 8397 7 taskgated-helper: (ConfigurationProfiles) [com.apple.ManagedClient:ProvisioningProfiles] App.Dext: Unsatisfied entitlements: com.apple.developer.driverkit.transport.usb I have already registered the entitlement com.apple.developer.driverkit.transport.usb with my vendor ID in the Apple Developer portal. However, when I download the provisioning profile, it doesn’t include the idVendor value. Screenshot from the developer portal (provisioning profile without idVendor) ? <key>com.apple.developer.driverkit.transport.usb</key> <array> <dict> <key>idVendor</key> <integer>1356</integer> </dict> </array> -Is this error caused by me registering the vendor ID incorrectly? -Or is there an issue with how the entitlement is reflected in the provisioning profile? Any guidance would be appreciated.