Built in to Disk Utility (somewhat hidden in Applications > Utilities folder) are options to create disk images, perfect for archiving a large number of files and folders, or even a full Home directory, complete with encryption and password. Is there an easier way, though?
The DMG In DropDMG
A disk image on a Mac is like plugging in an external disk, or flash drive, or CD/DVD. It ‘mounts’ on the Mac’s Desktop so you can view or copy files. Disk images are a great way to backup files, package files to send to other Mac users, or archive files for safekeeping; encrypted and secure.
Disk Utility does that but is a bit cumbersome to use and missing plenty of presets which make using a disk image worthwhile. Enter DropDMG, a Mac disk image building utility which makes it easier to create archives that can be stored or shared. If you find Disk Utility to be a bit cumbersome and confusing, and it is, the DropDMG is a better, faster, easier solution to archiving files.
Take a look. Self explanatory, no?
Click the Plus button to create a new disk image, or just drag and drop a file or folder of files onto DiskDMG.
Select the Format from the drop down menu. Set the encryption and password. Select a size for the image and you’re mostly good to go. Depending on the Format selected, the disk image can be viewed only by other Mac users, by Windows PC users, and only those with the proper password. The encryption prevents anyone from viewing the disk image files without the password.
DropDMG has been around the Mac community for years, and it’s popular among Mac app developers who use it to distribute their software. Built in to DropDMG are tools to create a layout of instructions so the recipient knows what to do with the disk image file once it’s opened.
Most Mac users won’t have a need for the layout functionality, but it can be very handy simply to make sure the archive recipient knows what to do with the archive files when received.