Lisp for Mac

Mac Universal

LispWorks® for Macintosh®

http://www.lispworks.com/products/lwm.html

Related Links:

Macintosh Common Lisp (MCL)

http://code.google.com/p/mcl/

http://en.wikipedia.org/wiki/Macintosh_Common_Lisp

Common Lisp development on Mac OS X

http://www.mohiji.org/2011/01/modern-common-lisp-on-osx/

Aquamacs puts the Mac in Emacs

http://aquamacs.org/