UPDATE: (5/06) SBCL now runs natively on Intel-based Macintosh systems.
I upgraded to a 20″ iMac Core Duo (from a 17″ iMac G5) on Thursday night.
I then found out that neither SBCL, CMUCL, nor OpenMCL will run under the “Rosetta” PowerPC emulation facility. I’ve got a half-assed compile of CLISP working, but it fails one of its tests because I’m unable to install GNU libsigsegv (doesn’t compile on OSX/Intel). Tried to bootstrap SBCL with CLISP, but no go. I can use CLISP to bootstrap ABCL, but it’s not exactly what I’m looking for.
Out of the commercial Lisp offerings, Lispworks Personal Edition hangs on startup. I’ve not tried Allegro CL yet, because the eval/free version of ACL v8 isn’t out yet…