[Discuss-gnuradio] usrp_fft.py -W and -S not working in OSX?

[Max Moser]

Hi there, i am trying to play around further with the tools in  
gnuradio and was surprised that when i use
usrp_fft.py -f 27.195M everything worked as expected, but as soon as  
i added the -W or -S to the command
nothing works anymore. Application seems to hand.

Does someone notice the same prob in osx? Is there a solution?

Greetings

Max