Now you can make use of its functionality as if it was physically connected to your machine. VirtualBox Mac OS X 10.9: boot from an USB drive. Once the connection is established, the device appears in the Device Manager of your system.Please keep in mind that you may be asked to enter a connection password, set by the owner of the shared device.
When a real USB port with a device attached is shared on your computer, the app actually virtualizes the device so that you can access it from a remote machine via a “virtual USB port”.