Contrary to the version string on the aluminumangel.org site, 1.1.8 seems to be the latest version of the Mac port; the above link is to that package. It appears (as mentioned on the "official" site at http://www.nongnu.org/crack-attack/ ) that the newest OS X version is part of a separate (forked) project, Mac Crack Attack, listed separately on iusethis.