Here are ways that you can convert dmg files to iso files on Mac OSX, Windows and Linux.
Before we start, let’s download a dmg file from the public domain. I found one on Apple’s article about The XMLHttpRequest Object website while I was learning Ajax and that can be downloaded from this link. This is just a 150KB dmg file and will be handy if you want to have something to test with while you’re following this tutorial.
How To Convert DMG Files To ISO Files On Mac
Nov 16, 2018 Mac OS X and macOS offer an easier way to convert DMG to ISO, which is only natural because DMG is the native disk image format used by Apple. The Disk Utility that's built into Mac will help you do the conversion from DMG to ISO. Sep 09, 2009 Converting image files on your Mac is easy thanks to a command line utility included in Mac OS X called hdiutil. Simply launch the Terminal and use the commands below, replacing the path and image file with your own. Convert a DMG file to ISO. Hdiutil convert /path/imagefile.dmg -format UDTO -o /path/convertedimage.iso. Mac OS X has a command line tool called hdiutil which allows you to create, mount and convert different types of disk image with ease. Here’s how to convert.dmg to.iso format using the Terminal: Just press Ctrl + Alt + T on your keyboard to open the Terminal.
Method 1: Using the Mac terminal
1. Open a terminal window from Finder > Applications > Utilities > Terminal.
2. Assuming that you have a disk image called apple.dmg in the current directory, type
hdiutil convert apple.dmg -format UDTO -o apple.iso
3. This will actually create a file called image.iso.cdr in the current directory (even though we asked for the output to be image.iso). This file can be safely renamed to image.iso, copied to a Windows server or machine, and burned with your CD/DVD burner of choice.
Generally, the command hdiutil can be used this way:
hdiutil convert /path/to/filename.dmg -format UDTO -o /path/to/savefile.iso
Method 2: Using DMGConverter (freeware)
1. DMGConverter is a disk image (.dmg, .cdr, .iso) creation and conversion tool which is simple and easy to use. It is a very useful tool for the collective processing of more than one file and every folder, and it can deal with all the fundamental processing with the drag & drop of the file/folder. For Mac Only.
How To Convert DMG Files To ISO Files On Windows
This is for Windows users who might have downloaded a dmg file and wondering how to extract the content, or not even knowing how and what to do with the dmg file. I’ve been there at a certain stage. the sharewares mentioned are fully functional and allows you to use the “convert dmg to iso” function even when it’s not registered yet.
Method 1: Using MagicISO (shareware)
1. Download MagicISO, install and run program.
2. Click to open dmg file.
3. Click to open “Properties” dialogs.
4. Uncheck Apple HFS and Apple HFS+
5. Check “ISO 9660” “Joliet” “UDF”
6. Click OK
7. Click to save as to iso image, or click to burn to CD/DVD without saving.
Method 2: Using UltraISO (shareware)
UltraISO basically does the same thing, but it can save you time from doing step 3 to 6 compared to method 1.
Alternative Solutions: dmg2iso (freeware) and isobuster (shareware)
I’ve heard and read that some people had been able to convert dmg files into iso files using dmg2iso (freeware). I’ve tried dmg2iso, converted my dmg file to iso without problem, but the converted iso file is corrupted and can’t be open by any tools (Daemon Tools, Alcohol, MagicISO, UltraISO and ISOBuster) that I’ve tested. It might work for you, but no guarantees.
ISOBuster is pretty similar to MagicISO and UltraISO. But too bad that the function to “convert dmg to iso” is restricted and won’t be functional until you buy the software.
How To Convert DMG Files To ISO Files On Linux
Free open-source app AcetoneISO provides a great deal of disc image manipulation tools not found in the Gnome desktop. It can mount/unmount a variety of image formats (ISO, DMG, MDF, NRG, BIN, NRG), convert images, create, encrypt, and decrypt ISOs, play DVDs (with the required codecs installed), and much more. It is particularly useful for mounting proprietary formats found in Windows and Mac boot discs. AcetoneISO is a one-stop-shop for all of your CD/DVD image manipulation needs, and is a free download for Linux only. This works on all famous linux distro such as Ubuntu, SUSE, Fedora, Mandrake, and Redhat.
So there you have it, and this should get you covered no matter what operating system you’re using.
Disk Utility User Guide
You can convert the image format and encryption of a disk image.
For example, if you create a read/write disk image but later want to prevent changes to the image, you can convert it to one of the read-only disk image formats.
In the Disk Utility app on your Mac, choose Images > Convert, select the disk image file you want to convert, then click Open.
Click the Image Format pop-up menu, then choose a new image format.
Read-only: The disk image can’t be written to, and is quicker to create and open.
Compressed: Compresses data, so the disk image is smaller than the original data. The disk image is read-only.
Read/write: Allows you to add files to the disk image after it’s created.
DVD/CD master: Can be used with third-party apps. It includes a copy of all sectors of the disk image, whether they’re used or not. When you use a master disk image to create other DVDs or CDs, all data is copied exactly.
Hybrid image (HFS+/ISO/UDF): This disk image is a combination of disk image formats and can be used with different file system standards, such as HFS, ISO, and UDF.
If you want to change the encryption, click the Encryption pop-up menu, then choose an encryption type.
Enter a new name for the image in the Save As field, click Save, then click Done.