Installing gr-usrp

Hi guys,

I’m really new in GNUradio, I need you help for installing gr-usrp in
gnuradio (MAC OS X 10.6.8)
i made the images, the gnuradio-companion work very well, my MAC detect
my usrp B100 , but my gnuradio-companion cannot found my b100

best regard

PAscualino