[Bug 1850570] Re: Cannot use usb-host on Mac OS

[John Arbuckle]

I am also having problems with using real USB devices. I tried a C-Media
USB sound card, a CISCO USB headset, and a PNY flash drive. All of them
seem to be detected by the Windows 7 guest, but can't be started for
some reason. I have tried running as root. I didn't see any libusb
errors. My Windows 2000 guest also has issues with starting the USB
sound card.

My command-line:
sudo qemu-system-x86_64 -hda "Windows 7 HD.qcow2" -boot "c" -m 5000 -device 
ich9-usb-ehci1 -device usb-host,vendorid=0x0930,productid=0x6545

Even when I unmount the flash drive first Mac OS 11.1 will actually
mount the flash drive when I try using it in QEMU.

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https://bugs.launchpad.net/bugs/1850570

Title:
  Cannot use usb-host on Mac OS

Status in QEMU:
  New

Bug description:
  Usb-host will not work on Mac OS 10.15.  Qemu runs, though it gives
  these errors and the drive does not show up.  Also, when Qemu is
  starting the drive ejects and remounts twice. Qemu built with
  ./configure --target-list=i386-softmmu,x86_64-softmmu --enable-sdl
  --disable-cocoa --enable-sdl-image.

  qemu-system-i386 image.qcow -usb -device usb-kbd  -device 
usb-host,vendorid=0x0781,productid=0x5571
  libusb: error [darwin_claim_interface] USBInterfaceOpen: another process has 
device opened for exclusive access
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] USBInterfaceOpen: another process has 
device opened for exclusive access
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found
  libusb: error [darwin_claim_interface] interface not found

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