DropDMG free download for Mac


10 October 2019

Quickly create disk image (dmg) archives.


DropDMG is the easiest way to create macOS disk images, which 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. Disk images are also the only archive format whose contents you can directly access in the Finder. 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.

DropDMG supports advanced options such as signed, encrypted, and segmented disk images; WYSIWYG layout with background pictures and custom volume icons; and rich-text license agreements in multiple languages. There are many time-saving features, and it can also be automated via AppleScript, the command-line, and Automator.

What's new in DropDMG

Version 3.5.8:
  • The Create macOS Install Disk command works around some issues with the macOS 10.15 Catalina installer that could cause errors or the creation of incomplete installation disks.
  • Create macOS Install Disk automatically shows you the volumes list when it’s time to select the destination volume, saving you a step.
  • Updated the Create macOS Install Disk and Signing sections of the manual.
  • When calculating the size of the source folder or app, DropDMG now counts the sizes of any extended attributes. This fixes a problem where some apps (e.g. those made using the Qt framework) that include large numbers of small code-signed files wouldn’t fit on the disk image.
  • Work around a series of bugs in macOS 10.15 that sometimes caused a "Resource temporarily unavailable (-54)" error when creating a disk image with a license agreement.
  • Worked around an issue with macOS 10.14 where the log detail drawer might be slightly too short to fit all of its contents without scrolling.
  • If you have a disk image with a pre-existing license agreement and convert it with None as selected license, on macOS 10.15 the license is kept rather than deleted. This is due to a pair of bugs in Catalina (FB7362946, FB7362950).
  • Fixed a crash that could occur if there was an error creating a macOS install disk.
  • Fixed a bug that could cause a crash when a Software Update error occurred.
  • Fixed a bug with the crash reporter window and Dark Mode.

48 DropDMG Reviews

See all

Rate this app:

04 August 2007

Most helpful

Very easy to use. Good!
Like (12)
Version 2.8.1
19 August 2018
Switched from iDMG because DropDMG is still well maintained. Great application.
Like (1)
Version 3.5.4
05 December 2016
I don't know what's going on, but it's having trouble with 10.12.1 macOS Sierra. Took a very long time to create a blank, encrypted DMG (that wouldn't eject until I forced it in Terminal) while Apple Disk Utility did it in seconds without any trouble. Same thing with a different computer as well.
Version 3.4.3
2 answer(s)
C-Command Software
C-Command Software
08 December 2016
Please contact us at dropdmg@c-command.com with some more information so that I can look into this. I've not heard other reports of these problems, and I just tested this on my Mac with 10.12.1. The times were very close, and there was no problem ejecting the .dmg.
Like (1)
09 December 2016
I think I might have accidentally used the new beta file system in Sierra for the DMG or had some other issues. It might just be all the junk I had running on the computers at the time along with some experimental tasks unrelated to DropDMG. I'll recheck it later and report to you if it's an actual issue with DropDMG and not just some esoteric issues on my end.
06 November 2016
Great utility - more than ever since 10.12
Version 3.4.3
24 August 2016
This seems to be mostly a GUI version of the hdiutil command, that is part of the OSX Unix command structure. Those who want to try their hand at it can create a Service using Automator and the "Run Shell Script" action item with the following command for a simple version of this (ignore brackets):
{hdiutil create -fs HFS+ -srcfolder "__OBJ_PATH__" -volname "__OBJ_NAME_NO_EXTENSION__" "__OBJ_PARENT_PATH__/__OBJ_NAME_NO_EXTENSION__"}

I used a free, old but reliable product called "On My Command" from Abracode to get this service. It is item 509 in the command listings. I have been using it for years. It makes it very handy and fast to have as a Service as opposed to an App.
Version 3.4.1
25 May 2016
Fake/bad link. Get directly from C-Command; http://c-command.com/downloads/DropDMG-3.3.dmg
Version 3.3
05 November 2013
Can also do Image compacting, although not so convenient to use but it does the job.
Version 3.2.3
24 May 2013
I think we can keep this one fairly short... The functionality is superb. It works and once its set up I can't imagine for a second it could be any easier to use. But by all the gods its a user experience train wreck. You will figure it out, you will absolutely feel that you have spent your money wisely... you will, at points, think the developers could think about the information architecture of the app. Buy it, there's nothing better.
Like (2)
Version 3.2.2
1 answer(s)
25 May 2013
Thanks for the review. It sounds like you were expecting a different sort of workflow. If you have a moment, we'd like to hear some more specific feedback at dropdmg@c-command.com.
Like (3)
26 March 2013
I am upgrading my former comment of DropDMG. This software is not expansive at all. Just look at the help page: http://c-command.com/dropdmg/manual-ah/ You can try it one month, definitely not the MAS. The devoloper work on MAC since at least 12 years. If we want good product we have to pay for it. I don't work for free. The support seems very good to. I bought it.
Like (5)
Version 3.2.1
29 November 2012
Gets better with time, very useful and reliable - and great support!
Like (1)
Version 3.2
09 November 2012
Like (1)
Version 3.2


App requirements: 
  • Intel 64
  • Mac OS X 10.7.0 or later
Developer Website: 
Download(17.4 MB)Purchase nowMacUpdateInstall with MacUpdate

Downloaded & Installed 100,603 times