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.