The MCLIDE Lisp IDE runs on MacOSX 10.4 and up (Intel or PPC). It can potentially be used with the same Lisp implementations as Slime/Swank. MCLIDE is verified to work with: Clozure CL (a.k.a. OpenMCL) Macintosh Common Lisp (MCL) MCLIDE may work at least partially with: LispWorks CMU Common Lisp (CMUCL) Allegro CL Steel Bank Common Lisp (SBCL) CLISP Scieneer CL Embeddable Common Lisp (ECL) Corman