Unable to open DMG files - “Corrupt Image”

[jamespham94]

I created a DMG file using Disk utility in Recovery Mode (File -> New Image -> Image from Folder)

I tried all the possible options from this question:

extracting DMG using 7Zip - not working
converting it to another format like ISO - not converting
opening DMG using Disk Drill - not opening
opening DMG using Data Rescue - not opening

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Trying to google and using hdiutil buts its not working on first code " hdiutil: attach failed - Operation not permitted "

I'm also did active " csrutil disable " in Terminal as well.

hdiutil attach -nomount -noverify -noautofsck -readwrite /volumes/"name of your image"

fsck_hfs -drfy /dev/diskxsx (x is your disk number)

hdiutil detach /dev/diskxsx (x is your disk number)

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I hope anyway can help me to take back this files by any things i do. All this file is really important for me.

Many thanks

 

[goldnut]

Are you trying to make a bootable disk?

If so, use Diskmaker X and dump the dmg file into your usb drive.

https://www.macworld.com/article/3284378/how-to-create-a-bootable-macos-mojave-installer-drive.html