Macintosh Common Lisp (MCL) is an implementation and IDE for the
Common Lisp programming language.
> MCL was famous for its integration with the Macintosh toolbox
> (later: Apple Carbon), which allowed direct access to most of the
> Mac OS functionality directly from Lisp. This was achieved with a
> low-level interface that allowed direct manipulation of native Mac
> OS data structures from Lisp, together with a high-level interface
> that was more convenient to use.
>
> In a 2001 article in Dr. Dobb's Journal, Peter Norvig wrote that
> "MCL is my favorite IDE on the Macintosh platform for any language
> and is a serious rival to those on other platforms".
? [Wikipedia][1]
> ## History
>
> In 1987, Coral Software released the first version of Coral Common
> Lisp, a Common Lisp application development environment for
> Macintosh computers.
>
> Coral Common Lisp was widely used by Apple Computer when developing
> Apple Dylan. In 1989, Apple Computer acquired Coral Software and
> Coral Common Lisp was renamed Macintosh Common Lisp.
>
> In 1990, Apple Computer released a new version of the Macintosh
> Common Lisp that corresponded to Common Lisp described in Guy L.
> Steele's second edition of Common Lisp the Language. Some time
> later, Apple Computer stopped developing several of its development
> environments and compilers, including Macintosh Common Lisp.
>
> On November 10, 1994, Apple Computer transferred the rights to the
> Macintosh Common Lisp to Digitool, which was created to continue
> developing the Macintosh Common Lisp. One of Digitool's first tasks
> was to release MCL for Macintosh based on PowerPC processors, which
> by then had replaced Macintosh based on Motorola 680x0 processors.
> As a result, the MCL compiler has been completely rewritten.
>
> In May 1995, Digitool released its first version for the Motorola
> 680x0 processors, and in April 1996 the first version for PowerPC.
>
> In March 2008, Digitool released open source version 5.2 for PowerPC
> processors.
? Open Source Release Notes MCL 5.2
Compatibility
Architecture: PPC
[1]:
http://en.wikipedia.org/wiki/Macintosh_Common_Lisp