Feb 10, 2007 So: shut down XP, and in Parallels, choose 'Edit - Virtual machine'. In the hardware list on the left side, click the 'add' button and add a USB host adapter (pick any of the other options ad desired). The start XP. It will come up with some hardware recognitions, and then request the Windows XP CD to install drivers (for the USB host adapter). Parallels for mac install windows xp. ..