maxima on os x and plot2d



Dear group -
When attempting to use maxima's plotting function on the os x platform, 
the
following error is encountered:
(C1) plot2d(sin(x),[x,0,1]);
/sw/lib/maxima/5.9.0/omplotdata: line 3: exec: wish: not found

My first question is: does wish work on os x and where can I find it?
  The second question is where to put it. On my linux system, wish is in 
/usr/bin. My guess is the appropriate place is /sw/bin.
Thanks,
Dick Fell

Richard N. Fell
Martin Fisher School of Physics
Brandeis University
Waltham, Ma 02454
fell@brandeis.edu
781.736.2860