If you have any images stored in Nero image format and don't use Nero Burning ROM, you can use simple converter named NRG2ISO to convert NRG to ISO. and then in the 'Convert' window that will appear, make sure you tick the ISO checkbox, set the destination save file path and hit OK to save the ISO file.Popular burning utility Nero Burning ROM uses own proprietary disc image format that is identified by file extension NRG. Using PowerISO: Open the DMG file in PowerISO, then select TOOLS menu > CONVERT. Pull down the 'Image Format' menu and choose 'DVD/CD master', then click 'Save'.dmg image from the sidebar list and then click the 'Convert' button in the toolbar. Launch Disk Utility (found in Applications > Utilities).Mount the DMG disk image you want converted to CDR format by double-clicking it in the Finder.You can't, unless the DMG files are uncompressed (rare) in which case you would use Toast 5 Titanium to mount the DMG file and then you'd make a new Toast disk image of that mounted volume, but don't count on it, because most DMG files cannot be mounted under classic Mac OS.

So if you're stuck with a DMG file and would like to convert it to ISO in order to feed it to a disk image burner/cloner app (or to 'dd') then follow these steps: using 'dd' under OSX or using HDD Raw Copy under Windows) because they are compressed. CDR under Mac OS X) disk image format is universally supported, therefore it's a much better choice for storing files or making a disk image backup.ĭMG files also cannot be directly cloned (e.g. The fact that the DMG disk images are compressed poses a compatibility problem to most Windows users and earlier Mac OS versions, e.g. DMG files are disk images that are compressed using Apple's proprietary format and Mac OS X default disk image format.

Change dmg to iso