If you ever have the need to create a disk image, DMG Canvas is an application for Mac with which you can give a personal touch to the window that appears after mounting a file of this type.
Use a graphics editor to create any window background. Resizes this picture or sets the position and size hand. If you do not want a photo as wallpaper, choose a fill color. You can also change the size of icons that will make up the image.
Other features that can also be customized disk image are the name and the volume icon, formatting, encryption, compression, and so on . Do not forget to include legal information about the license applicable to the contents of the disk image.