You don’t have to put your programs in the Applications folder, though: they’ll run from anywhere. Then you can feel free to delete the original DMG file: you don’t need it anymore.When you’re done installing: just click the “Eject” arrow.And you’re done: the Flash Player for Mac is now installed.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 First, download the Flash Player for Mac.Like if you wanna download Flash Player for Mac from this page, you’ll directly get the. Most MacOS applications downloaded from outside the App Store come inside a DMG file.