XLisp 2.1e is now available for the Macintosh. There are two files available here for downloading; they should appear on sumex.stanford.edu, mac.archive.umich.edu, and other sites soon. One (xlisp.hqx) contains the XLisp executable, documentation, and sample code. It provides all the functionality of XLisp 2.1e with an interface similar to that of Apple's MCL -- it is not as powerful as MCL, but it is a lot cheaper (free) and less disk-greedy. It should be completely compatible with XLisp code written on other platforms. The other (xlispsrc.hqx) contains the complete source code to the application, along with a THINK C v6 project file. Note that it does not contain the complete xlisp distribution code; files for compiling it on other operating systems have been left out. You can ftp the latest complete xlisp distribution (with code for Unix, Amiga, and DOS platforms) from glia.biostr.washington.edu. Like XLisp on other platforms, this program is in the public domain. The source code to the xlisp engine is completely unchanged from the code used on other platforms.