Some people create a “Games” directory, to keep games separate from other applications. You don’t have to put your programs in the Applications folder, though: they’ll run from anywhere.
Double-click the DMG file to open it, and you’ll see a Finder window.dmg installation file from the official link on above Like if you wanna download CCleaner for Mac from this page, you’ll directly get the.
Most MacOS applications downloaded from outside the App Store come inside a DMG file.