I've downloaded Makertech Cura via the link the tutorial, it was not 7Z, it was a normal dmg file and I was able to open that dmg and put the Cura app into applications.
Upon opening my MacOS 10.14.4 complains it is damaged and recommends to move it to trash. Is the Mac version broken? Anyone had the same issue, are there ways to fix this?
All right, this error is described in the docs a few lines down... sorry for that.