Then you can feel free to delete the original DMG file: you don’t need it anymore. When you’re done installing the application, it’s a good idea to unmount the DMG in Finder when you’re done installing: just click the “Eject” arrow. DMG files are mounted by your system, like a sort of virtual hard drive. Install Applications on MacOS Silently Using DMG Files, to make its content available (name will show up in the Finder sidebar), usually a window opens showing the content as well.
