15.20 Changes in the installers
15.20.1 Package format on Mac OS X
LispWorks 7.1 is now supplied as a
.pkg file, to be installed using
15.20.2 Package format on FreeBSD
LispWorks 7.1 supports FreeBSD 10.x and later and is supplied as a standard package file, in pkg(8) format. Older versions of FreeBSD are not supported.
LispWorks Release Notes and Installation Guide - 19 Oct 2017