You can merge multiple DMG files using your Mac's Disk Utility. A DMG file contains a compressed package that usually includes a program, backup or a compilation of files. Before you can view the individual files in a DMG package, you must first mount the disk image to your Desktop. After mounting the image, you can select all of the files contained within the DMG package and combine them into a single DMG file. Using Disk Utility, you can then burn your combined DMG package to a DVD for storage.

Step 1

Right-click a blank area of your Desktop and select "New Folder." Input a name for the folder.

Step 2

Drag each of the DMG files you want to combine to the new folder you created. Double-click each folder to launch the DiskMounter app and display the contents of the folder.

Step 3

Select the files, and then drag them to the new folder you created. Complete this process for each DMG file you want to combine.

Step 4

Click the "Finder" icon, select the "Go" menu, choose "Utilities," and then launch "Disk Utility."

Step 5

Click the "New Image" icon, and then select all of the files from the folder you created that you want to combine into a single DMG file. Click the "Save" button to create a new, combined DMG file.

Step 6

Select the new DMG file from the sidebar in Disk Utility, and then click the "Burn" option.

Step 7

Select the "Burn" icon, place a writable DVD into your DVD burner, and then click "Burn" again to begin burning the DMG file to the DVD.