Wacom Intuos tablet (Central Square, Cambridge)

I found a tablet and two cables (but no stylus) on the street. I have connected it to my MacBook Air but, even though I DLed the Wacom official driver app, it apparently doesn't work. I guess, though, that if the tablet just plain didn't work, the original owner would have thrown it in the trash, but I don't know...

other info:

* model PTH-651, size medium
* two cables
* LED won't go on, but for all I know, this model doesn't have an LED?
* no manual

please don't ask if I still have it! once I have given this away, or promise it, I will mark this post accordingly.