I've found a way to convert MacOS Mojave installer into ISO file and it works. You can use hdiutil to convert from.dmg to.iso directly: $ hdiutil makehybrid -iso -joliet -o filename.iso filename.dmg Renaming.cdr to.iso is bad advice! An.iso has a slightly different format that allows PC users to play the DVD as well. For those who don't know, DMG files are mountable disk image files for Mac OS, just like ISO files of Windows OS. DMG files are generally found to be compressed and encrypted. Since it is Mac OS compatible, so it is easier to burn it to USB using a Mac platform. In fact, you can do that with in-built utilities.
Convert DMG to ISO File
A .DMG file is the disc image file used by MAC OSX. It is an exact copy of a hard disk or compact disk. The DMG file can be burned to a CD or mount as a normal volume on Macintosh computers. Usually, the data in DMG file is stored in compressed format. On a Windows PC, AnyBurn can convert DMG file to ISO format, or burn it to a blank CD / DVD disc. To convert DMG file to ISO format, please follow the steps,
1. Run AnyBurn, and click 'Convert image files'.
2. Select the source DMG file, and select the destination image file type to ISO format. Anyburn will create the default destination image file name based on the destination image type. The destination ISO file will be in the same folder of the source DMG file, you can change it if necessary. After you have made the selection, click 'Convert Now' to start conversion.
3. AnyBurn will start converting the DMG file to ISO format, and showing the conversion progress.
4. You should see the message 'Converting image file finished successfully.' when the conversion complete.