problem with xbee usb adapter

Hi guys,

I have the spark fun's xbee usb adapter and i was trying to connect it to the pc, but when i open the xctu i can't find the usb port... Neither in a pc, nor a mac... In the mac its only modem connection that shows...

I've tried already to download all the latest updates but it is still not working.

Can someone help me?

...

I have the spark fun's xbee usb adapter

Which one? Carrying which XBee?

this one: SparkFun XBee Explorer USB - WRL-11812 - SparkFun Electronics

connected with xbee s2