Macintosh Common Lisp (still) continues to be an effective integrated development environment for Lisp.
This collection comprises patches for version 5.2. Create the directory
"CCL:patches;patches 5.2;", place the patch files there and add something like
(defvar *patches-loaded* nil) (when (not *patches-loaded*) (ccl:load-patches "ccl:patches;" t) (setq *patches-loaded* t))
to the start-up process.