For those of us who need these packages, here are some tips for installing both under 10.6: For fink, a great set of instructions exists here: http://sage.ucsc.edu/~wgscott/xtal/wiki/index.php/64-bit_Fink_for_10.5 Open up the Terminal Follow all the instructions on the page http://sage.ucsc.edu/~wgscott/xtal/wiki/index.php/64-bit_Fink_for_10.5 I chose the default options, for those of you 64-bit p