Macintosh Common LISP

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Macintosh Common Lisp (MCL) is an implementation and IDE for the Common Lisp programming language. Various versions of MCL run under Mac OS (m68k and PPC) and Mac OS X. Versions of MCL up to and including 5.1 are proprietary. Version 5.2 has been open sourced. In 2009 a new different version of MCL has been open sourced: RMCL. RMCL is based on MCL 5.1 and does run under Rosetta on Intel-based Macs. 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.