Dec 16, 2019  Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions. Learn more For more information about the createinstallmedia command and the arguments that you can use with it, make sure that the macOS installer is in your Applications folder, then enter this path in Terminal.

Open DMG File on Mac OS

Since DMG is a native Mac OS disk image format opening DMG file is as easy as double clicking on it in Finder. When you open DMG file this way, disk image stored inside DMG file will be mounted, and then opened in a separate Finder window. If DMG contains installation of an application, then installation window of the app will open. If not, then you will see the disk image content. Even in case when disk image contains installation of the application you can still view contents of the mounted DMG file by clicking on its name in Finder Locations section or by selecting Go->Go to Folder… in Finder menu, typing /Volumes/ and clicking Go button.

Mount and unmount using Hdiutil

To mount a disk image using hdiutil you need to open terminal app and type following command there:

hdiutil mount example.dmg

To unmount type:

hdiutil unmount /Volumes/example

Where /Volumes/example is a path where disk image was mounted

Mount using DiskImageMounter.app

You can quickly mount DMG file by Control-Clicking on it and selecting Open With->DiskImageMounter.app. This will mount DMG file and its content will become available in Finder Locations and /Volumes folder.

How To Install Dmg File From Terminal 4

Mount using Disk Utility

You can also mount DMG file using Disk Utility application available in Mac OS. Look for Disk Utility using Launcher and launch it. After that select File->Open Disk Image… in the main menu and choose DMG file you want to mount. After clicking Open you should see a screen like below where disk image details will be shown including used and free space, mount point, disk type and more.

You can also access disk image mounted by Disk Utility in Finder Locations or /Volumes folder.

How To Install Dmg File From Terminal 1

Once application located in the DMG file is installed it is safe to delete it since DMG file is only needed during the installation process.