Comment to "Can't open device" problem solution:
When working with USB-... converter in Linux it appears as /dev/ttyUSB device. XiLab shows it in a list, but when you try to open it,
an error "can't open device" occurs due to the lack of permissions to the device.
To solve this problem, create a file: /etc/udev/rules.d/31-ximc.rules and add the next line into it:
SUBSYSTEM=="usb", ATTR{idVendor}=="067b", MODE="0666"
idVendor identifier can be found by executing lsusb command.
Mac OS: