Re: Mac OS real USB device support issue

[Gerd Hoffmann]

  Hi,

> The questions that come to mind are:
> - Does libusb_detach_kernel_driver() work on Mac OS?
> - Is libusb_detach_kernel_driver() called on Mac OS in QEMU?
> 
> The only mention of this function in QEMU comes from host-libusb.c. 
> 
> After some tests I found out the function
> host-libusb.c:usb_host_detach_kernel() is being called on Mac OS 11.1.
> It never reaches the libusb_detach_kernel_driver() function. It stops
> at the continue statement.

Yep.  Most likely libusb_kernel_driver_active() returns 0 because the
kernel driver management functions are not implemented for macos.

take care,
  Gerd