In LispWorks 6.1 for Macintosh and earlier versions, save-universal-from-script
provides a convenient way to create a universal binary on an Intel Macintosh, using a script designed for saving a mono-architecture image.
LispWorks 7.0 and later versions do not support universal binaries, hence save-universal-from-script
now simply signals an error.
LispWorks User Guide and Reference Manual - 20 Sep 2017