I searched for MFi's authentication information, but did not specify the need to add an MFI chip to the USB-C interface. Have you resolved the communication issue between the APP and external USBC? I searched for MFi's authentication information, but did not specify the need to add an MFI chip to the USB-C interface. Have you resolved the communication issue between the APP and external USBC? App & System Services Drivers IOUSBHost 1 0 499 Mar ’24