DropDMG is the easiest way to create macOS disk images, as well as cross-platform archives. Just drag and drop a folder or file and you're done. Or, you can drag an existing disk image or archive onto DropDMG to convert it to any of the other supported formats or to burn it to CD or DVD.

Disk images pack entire folders or disks into a single compressed file, either for transport across the Internet or simply for backup. They are the only archive format whose contents you can directly access in the Finder, without the potentially slow and disk-consuming step of expanding the files into a folder.

DropDMG supports advanced options such as encrypted and segmented disk images, Retina-optimized background pictures and custom volume icons, and rich-text license agreements in multiple languages. There are many time-saving features such as configurations to keep track of your favorite combinations of settings. It can also be automated via AppleScript, the command-line, and Automator.

- Create and convert disk images and archives with a simple drag and drop. There are also many other convenient ways to invoke DropDMG.

- DropDMG supports all the major formats, including compressed .dmg files, .sparsebundle files, .zip and .tar.gz archives, and hybrid disk images.

- Create .dmg disk images that are signed for Gatekeeper and macOS 10.12.

Backups, Archival, and Cloning:

- Save disk space and network transfer time by compressing your files. Choose faster or more efficient compression.

- Split large files or folders into multiple segments to burn them to optical discs or easily transfer them over a network.

- Verify the integrity of your backups and archives to ensure that the media is still intact and that you'll be able to restore them if needed.

- Create a device image that records the exact contents of a data CD or DVD. You can then burn bootable backup copies of the disc, or double-click the disk image to access its contents as though the disc were still in your optical drive.

- In one step, create a device image clone of an entire hard drive, optimized for restoring using Apple Software Restore or Disk Utility.


- Encrypt files that you want to keep private. DropDMG's encrypted, writable disk images are faster and safer than Apple's FileVault, but just as secure and searchable via Spotlight.

- Create encrypted, compressed disk images to securely transfer files via e-mail, Dropbox, or FTP or to store backups safely off-site.

- Choose from 128-bit and 256-bit AES encryption, approved by the U.S. National Security Agency.

- Optionally store your passphrases in the macOS keychain, so that you can quickly create and access encrypted disk images, without the hassle of double-typing or the risk of typos.

- Mount disk images at specific locations in the filesystem, so that your applications can keep their support files encrypted.

- Mount encrypted, segmented disk images without having to enter the passphrase separately for each segment.


- Runs multiple operations simultaneously, so you that you can keep working while DropDMG processes in the background.

- Takes advantage of multiple processor cores for faster compression and encryption.

- Keeps a detailed log of all the successful operations as well as any errors, including statistics such as the throughput and how much space was saved using compression. New log entries are also reported via Growl.

- Get detailed information about your disk images: their formats, partitions, compression ratios, checksums, etc.

- Easily queue up bulk operations for creating, converting, mounting, verifying, getting info, burning, joining, etc. If multiple encrypted disk images share a passphrase, you only need to enter it once.

- Process the names of the output files to add the current date or make the filename server-friendly.

What's New

Version 3.5.3

- The "Compact Image…" command is now available as a toolbar button.

- Updated the "Mount Image…" and "New Blank Disk Image…" sections of the manual.

- Fixed a bug that could cause an internal error when using the "Destination" pop-up menu.

- Updated the Italian localization.

Ratings and Reviews

Excellent App

Alfred Scott

I was looking for a way to package my programming in a disk image with a custom background image and a custom image on the icon. I was able to get it to work by following the instructions. I know you can do all this with Disk Utility, which I had been using to create disk images for a long time, but it was just too difficult to fight with to get the background image. It's just not worth my time to fight with something like this when someone has taken the time to create an app like this which is very reasonably priced.

Like many powerful apps and software tools, I only use about 5% of the capabilities of the software. But that's also true for users of my software (WildTools for PowerCADD)!

Thanks for a very complete and well-documented program.

as reliable as always


This is one of those great apps. It does a very simple thing but it does it very well.

It's alright.

Mr. Krabbs

Doesn't do what I bought it for - split a .zip into multiple parts. Only .dmgs.

Useless to me and it looked like it was going to do that.

Developer Response

The feature to create segmented .zip archives was added in DropDMG 3.2 (November 2012). In general, if you have a question about what DropDMG can do, please view the online version of manual ( or contact us at


C-Command Software, LLC
14 MB
English, Danish, Dutch, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish
Age Rating
Rated 4+
© 2018 C-Command Software


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