As a Lisp newbie, I am just in this for old-age recreation, not for any
'practical' reasons.  Anything Lispy that glitters is my motto, like
Paul Graham's fine book about macros for example.

Years ago when I was a wage slave I dabbled with Scheme and CL but
never followed up by doing anything constructive.

(wonder how many thousands of people are in that particular boat)

Forgot every tidbit I learned, now only have vague memories of
Continuation-Passing-Style, toy compiler construction, implementing
"Wind" and "Unwind" escape procedures in Scheme, and macro useage
wherever macros will override the harm they do by making Lisp more
difficult to troubleshoot.

Gotta lot of enjoyment studying books like "Essentials of Programming
Languages", and even reading my old dog-eared "Little Lisper" book,
trying to justify to myself any possible uses for various versions of
the Y operator.<g>

In the distant-distant past I even bought that 12-grand "MacIvory"
board for the Mac computer I had at the time, but never got the time to
wade through all the Texas-Instrument doc's on how to use that
dedicated Lisp chip.  (because I was literally working days, nights,
holidays, etc. at Hughes Aircraft in the days of the Cold War, testing
fire-control radars for the F14, F15, F18 aircraft radars, also did a
lot of work on the old robotic "Surveyor" moon probes)

All my old Lisp knowledge is in the past now, long forgotten.   I will
have to start from scratch to get back on board Lisp.

*********************************************
Rethorical question just in case anyone wants to respond:
   Has Lisp changed in the past 15 years?

I still have all my 15-year old Lisp books.   If no recent changes have
occurred, they should be adequate to get me back on board.

As I recall the Scheme folks were considering whether or not to make
macros an "official" part of Scheme.

About year 1990 the commercial vendors of Scheme implementations more
or less went out of business as far as "developing" improved up-to-date
versions of Scheme was concerned.

Private groups of volunteers took up the slack in developing newer
versions of Scheme.

Common Lisp kept getting slightly more complex with every meeting of
the "design-by-commitee" people who had to bless any changes to the
standardized design of Common Lisp.

At least Digitool is still in business, and I guess Franz still makes a
CL aimed at Wintel hardware. I don't think Franz makes a Mac version,
perhaps that has changed by now.

Being a Lisp newbie I probably have a lot of the above stuff wrong.

Gadd, I sure miss those monthly magazines named "AI Expert" - - I got a
lot of good tips about applying Lisp to real problems from that
magazine, before they went out of business.

Thanks again Raffael (and everyone else), for answering my original
question about whether Lisp would run on modern Mac operating systems
like "Panther".

Lisp certainly is a fun language, IMO.   Wonder if anyone else in this
forum has the prime reason of "fun" as their main motivation for
learning Lisp.    :-)