In Mac OS 9.2 the usb-audio device will work for about 30 seconds then cause the OS to crash.<br> In Mac OS 10.4.11, the system will detect the device but will not be able to use it.<br> In Mac OS 10.8.5, the system will also detect the device but will not be able to use it.<br> Used qemu-system-ppc and qemu-system-x86_64.<br> QEMU version 6.0.5.0 at commit 0add99ea3ea91af8230e3933ad7826b2da25a44d.<br> Host: M1 Mac running Mac OS 11.1.<br> Example command-line: qemu-system-ppc -hda <Mac OS 10.4 HD> -boot c -m 512 -cpu G3 -M mac99,via=pmu -device usb-audio,pcap="usb-audio capture.pcap" <br> I opened the pcap capture file in Wireshark and saw there was a malformed packet that was sent from the usb-audio device.<br>