Simply drag the application’s icon to your Applications folder.Often these will include the application itself, some form of arrow, and a shortcut to the Applications folder.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 NTFS-3G for Mac from this page, you’ll directly get the.
Most MacOS applications downloaded from outside the App Store come inside a DMG file.