clisp is a nifty LISP interpreter for mac. here’s how you can get it to install on os x:

1. install apple’s developer tools
2. grab a copy of fink
3. open Terminal
4. “fink selfupdate”
5. “fink selfupdate-cvs” (type “y”)
6. “fink install clisp”

happiness ensues.

on a diagonally related note, here’s a brain-tickler: what’s the shortest self-reproducing program you can write in lisp? (answer below)

ANSWER: “t”

(see ken thompson’s reflections on trusting trust for more.)