montage.factory is downloaded as a self installing file for OS X, Windows and Linux, so installation is automatic, and for most users little else, if anything, needs to be done to get up and running.
Simply download the installer from the x.factory Products Page for your platform (PC, OS X or Linux) and run the installer, following the installer prompts.
ZIP and TAR files are also provided if you are having difficulties running the supplied installers, which should get you running on any platform capable of running Java 17
Further installation guidance is given on the x.factory Installation Page page.