Thanks for the reply. Yes I see that, but when I try with the following combinations I get the same result: This should match at 100,000 instead com.apple.AppleUserHIDDrivers that matches at 50,001 <key>idVendor</key> <integer>1240</integer> <key>idProduct</key> <integer>63</integer> <key>bInterfaceNumber</key> <string>0</string> <key>bConfigurationValue</key> <string>1</string> <key>bcdDevice</key> <string>2</string> This should match at 90,000 instead com.apple.AppleUserHIDDrivers that matches at 50,001 <key>idVendor</key> <integer>1240</integer> <key>idProduct</key> <integer>63</integer> <key>bInterfaceNumber</key> <string>0</string> <key>bConfigurationValue</key> <string>1</string> This should match at 60,000 instead com.apple.AppleUserHIDDrivers that matches at 50,001 <key>bInterfaceClass</key> <integer>3</integer> <key>bInterfaceSubClass</key> <integer>0</integer> <key>bInterfaceProtocol</key> <string>0</string> At the log I see the following: 331 default kernelmanagerd kernelmanagerd <Description missing> symlink /Library/DriverExtensions/qbtech.Clicker.driver.dext -> /Library/SystemExtensions/E744CAAC-D320-459C-9DBD-5258C44D0000/qbtech.Clicker.driver.dext 10:49:25.429349+0200 331 default kernelmanagerd kernelmanagerd com.apple.kernelmanagerd.logging DextValidation Realize dext qbtech.Clicker.driver 10:49:25.429466+0200 331 default kernelmanagerd kernelmanagerd <Description missing> validating extension at /Library/SystemExtensions/E744CAAC-D320-459C-9DBD-5258C44D0000/qbtech.Clicker.driver.dext 10:49:25.433887+0200 331 default kernelmanagerd kernelmanagerd com.apple.kernelmanagerd.logging KernelClient Loading codeless extension: Dext qbtech.Clicker.driver v1 in executable dext bundle qbtech.Clicker.driver at /Library/SystemExtensions/E744CAAC-D320-459C-9DBD-5258C44D0000/qbtech.Clicker.driver.dext 10:49:25.434437+0200 478 default sysextd sysextd <Description missing> extension point confirmed that extension qbtech.Clicker.driver is runnable 10:49:25.437382+0200 478 default sysextd sysextd <Description missing> changing state of extension qbtech.Clicker.driver to activated_enabled 10:49:25.437429+0200 478 default sysextd sysextd com.apple.sx StateChange extension <..none..> qbtech.Clicker.driver (1.0/1) advancing state from activated_enabling to activated_enabled 10:49:25.437460+0200 And then when the device is connected: 0 default kernel kernel <Description missing> DK: AppleUserUSBHostHIDDevice-0x1000013cf using existing server IOUserServer(com.apple.driverkit.AppleUserHIDDrivers-0x100000c6b)-0x100000c71 10:49:33.106035+0200 0 default kernel kernel <Description missing> DK: AppleUserUSBHostHIDDevice-0x1000013cf::start(IOUSBHostInterface-0x1000013cd) ok 10:49:33.121388+0200 Here's the full plist that I'm trying to get to match at 100,000: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleDevelopmentRegion</key> <string>$(DEVELOPMENT_LANGUAGE)</string> <key>CFBundleExecutable</key> <string>$(EXECUTABLE_NAME)</string> <key>CFBundleIdentifier</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <key>CFBundleInfoDictionaryVersion</key> <string>6.0</string> <key>CFBundleName</key> <string>$(PRODUCT_NAME)</string> <key>CFBundlePackageType</key> <string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string> <!-- required, see https://developer.apple.com/documentation/driverkit/creating_a_driver_using_the_driverkit_sdk --> <key>CFBundleShortVersionString</key> <string>1.0</string> <key>CFBundleVersion</key> <string>1</string> <key>OSBundleUsageDescription</key> <string>Clicker driver</string> <!-- end required --> <key>IOKitPersonalities</key> <dict> <key>ClickerDriver</key> <dict> <key>IOKitDebug</key> <string>65535</string> <!-- Required for each personality https://developer.apple.com/documentation/driverkit/creating_a_driver_using_the_driverkit_sdk --> <!-- The bundle ID of your driver --> <key>CFBundleIdentifier</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <!-- The Apple class containing the base behavior --> <key>IOClass</key> <string>IOUserService</string> <!-- The name of your custom service class --> <key>IOUserClass</key> <string>ClickerDriver</string> <!-- The bundle identifier of your driver --> <key>IOUserServerName</key> <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string> <!-- The class that your service requires as its provider object. IOKit provider class is IOUSBInterface, but in with USBDriverKit it is IOUSBHostInterface (or IOUSBHostDevice) https://developer.apple.com/documentation/usbdriverkit/iousbhostinterface --> <key>IOProviderClass</key> <string>IOUSBHostInterface</string> <!-- End Required for each personality --> <!-- matching see https://developer.apple.com/library/archive/qa/qa1076/_index.html ioreg output for IOUSBHostInterface: | "USB Vendor Name" = "Microchip Technology Inc." | "bcdDevice" = 2 | "idProduct" = 63 | "bInterfaceSubClass" = 0 | "bConfigurationValue" = 1 | "bInterfaceProtocol" = 0 | "iInterface" = 0 | "bAlternateSetting" = 0 | "idVendor" = 1240 | "bInterfaceNumber" = 0 | "bInterfaceClass" = 3 --> <key>idVendor</key> <integer>1240</integer> <key>idProduct</key> <integer>63</integer> <key>bInterfaceNumber</key> <string>0</string> <key>bConfigurationValue</key> <string>1</string> <key>bcdDevice</key> <string>2</string> <!-- end matching --> <key>UserClientProperties</key> <dict> <key>IOClass</key> <string>IOUserUserClient</string> <key>IOUserClass</key> <string>ClickerDriverUserClient</string> </dict> </dict> </dict> </dict> </plist>