The current full version of Unshake is 1.4, "Meerkat", of which the latest release is release 2 and the previous release was (surprisingly) release 1
Early downloads of Unshake 1.4 release 1 (August 1st 2003) lacked a file (maclaunch.sh), which prevented the program from launching under Mac OS X. Versions downloaded after August 5th 2003 do not have this problem. Users of Mac OS X who have a deficiant distribution are advised either to download this file or the latest distribution.
The MD5 sums of the relevant zip files are as follow;