A DMG file is a disk image file used by macOS to distribute software, including operating system installations. It's essentially a compressed file that contains the installation data for Mac OS X. When you download Mac OS X from the App Store, it comes in a DMG file format.
hdiutil convert /path/to/installer.dmg -format UDRW -o /path/to/installer.img
What if your DMG does not contain a .app file, but rather a InstallOS.pkg or MacOSInstaller.pkg ?
Navigate into the app bundle using Terminal:
A DMG file is a disk image file used by macOS to distribute software, including operating system installations. It's essentially a compressed file that contains the installation data for Mac OS X. When you download Mac OS X from the App Store, it comes in a DMG file format.
hdiutil convert /path/to/installer.dmg -format UDRW -o /path/to/installer.img
What if your DMG does not contain a .app file, but rather a InstallOS.pkg or MacOSInstaller.pkg ?
Navigate into the app bundle using Terminal:
