WN2000RPT - connect to Mac

I have a router in one end of the house and my Mac Book Pro and Xbox360 in the other end. The signal is low so I got the WN2000RPT. I connected the Wn2000Rpt and the router. But I dont understand how to hook up my Mac to the RPT. In the manual it says "connect your PC to the extender by pushing the RPT WPS button and your PC's WPS button."
My Mac doessnt have a WPS button and the only thing I get on my network list is the same old router with the poor signal.

Can anyone please help?

Thanks.