There are two pre-compiled versions of LDAK: ldak5.2.linux - designed to be run on Linux systems (tested on Ubuntu 20.04 and RedHat EL7) ldak5.2.mac - designed to be run on a mac (tested on a Macbook Air) Each of these should simply run (after unzipping and changing permissions) If not, please see www.ldak.org/downloads2 for instructions on compiling your own version