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The easiest way to create and work with Mac disk images (.dmg files).

“I’ve been a very happy user of DropDMG. Thanks for all your work.”
Bruce Horn, creator of the Mac Finder
“DropDMG kicks ass!”
Brian Greenstone, Pangea Software
The DropDMG WindowThe DropDMG Window Configurations and Format OptionsConfigurations and Format Options Software License AgreementsSoftware License Agreements Background Pictures and Icon LayoutsBackground Pictures and Icon Layouts

Disk images pack entire folders or disks into a single compressed file, either for transport across the Internet or simply for backup. They are Apple’s preferred format for distributing Mac software and the only archive format whose contents you can directly access in the Mac Finder—no third-party software required.

icon-drag-and-drop Just drag and drop a file or folder, and DropDMG automatically figures out what to do: create a disk image, convert to another format, join files, etc. icon-deliver Deliver your Mac application with a signed .dmg file, a localized software license agreement, a Retina-optimized background picture and precise icon layout with a link to the Applications folder, and a custom volume icon.
icon-configurations Configurations let you reuse common collections of settings, and temporary options let you easily make one-off changes. icon-formats Supports all the major formats, including compressed .dmg files (smaller than Disk Utility’s), the new LZFSE format, .sparsebundle files, .zip and .tar.gz archives, and hybrid disk images.
icon-encrypted Assign a password and create mini vaults, encrypted disk images that are more flexible than FileVault and secure your files with AES encryption on your choice of HFS+ or APFS file system. Compact sparse disk images to reclaim unused space. icon-backups Make backups and archives, encrypt them for safe off-site storage, and verify them to ensure that the media is still intact and that you’ll be able to restore them if needed.
icon-burn Quickly burn files, folders, or disk images to CD, DVD, or Blu-ray. Multi-session support lets you add files to an existing CD. icon-clone Create a device image clone of an entire hard drive, optimized for restoring using Apple Software Restore or Disk Utility. Create bootable macOS install disks from downloaded OS installer apps.
icon-threaded Optimized for multi-core processors and runs multiple operations simultaneously, so you can keep working while DropDMG processes in the background. icon-segments Copy CDs and DVDs. Split large files or folders into multiple segments to burn them to disc or transfer them over a network.
icon-log Keeps a detailed log of successful operations, as well as any errors, along with throughput and compression statistics. icon-script Automate DropDMG via AppleScript, Automator, or the command line.
icon-folder Mount disk images as folders at specific locations in the filesystem, so that your applications can keep their support files encrypted. icon-more-info For more information, please see the feature list, screenshots, or the extensive user manual.
DropDMG: Create disk images in a snap.