How to install software(.dmg) on MAC
When you click on the .dmg a disk appears like this :
(By default the .dmg file is saved in the Downloads folder of your MAC).
When you click on this “disk”, here is the window that opens :
As shown in the picture, you move the game icon in the Applications folder, directly from this window.
Then go to the “Applications” folder and double-click on the software icon to launch.