To install, simply drag TkDiff to your /Applications directory.
Note that if you run the application by double-clicking on it, it
prompts you for filenames and revisions. If you'd rather run it from
the command line (the more traditional "Unixy" way), you'll find that
you can't pass filenames/revisions unless you do the following:
alias tkdiff "/Applications/TkDiff.app/Contents/MacOS/Wish\ Shell"
This is for csh/tcsh users, obviously. sh/bash/ksh users substitute, as
appropriate. Note that the slash is required, even in the presence of
the quotes, because the escaping has to occur when the alias is used
(i.e. expanded).
At any rate, once you've created this shell alias, you can do:
tkdiff FILE1 FILE2
and things should work nicely.
John Klassa
February, 2006