Once the Settings window is open, select
USB
.
Once USB is selected, turn on or check the
Enable USB
check box. Below this check box, you
should see an item for your Keyspan USB device. Turn on this check box as well. This will
emulate USB and tells your emulated environment that your Keyspan USB device is connected.
Keyspan USB Serial Adapter Software v2.x for Mac OS X User Manual
Rev 2006aug07 Page 33