So an Apple employee at the Apple Store used Disk Utility to create a DMG archive file of your old home user folder? I'm just piecing this together from all your different references since we are still missing some details .
Did you or the Apple employee try to open the resulting DMG file prior to erasing the computer?
What file system is on the external drive where the DMG archive file of your old home user folder is located?
mukmuk02 wrote:
I have used .... 'hdiutil attach -noverify -mount suppressed <path-to-dmg-file>' commands. I saw them on web. I tried but nothing happened.
Try the following commands and post the results. I've added a "verbose" option so more information is shown which may provide clues.
Use this command to check if any Disk Images are present (use it after every attempt to attach the DMG):
diskutil list | grep 'disk image' -A5
Try the basic attach with "verbose" so we can see what information may be provided:
hdiutil attach <path-to-DMG-file> -verbose -verify
Afterwards, don't forget to run the "diskutil" command to make sure that the disk image was not opened even if errors are shown.
Check the integrity of the DMG archive:
hdiutil attach <path-to-DMG-file> -verbose
Try with all safety checks disabled:
hdiutil attach <path-to-DMG-file> -verbose -noautofsck -ignorebadchecksums
Same as previous command, but add the "nomount" option just in case there is a problem with mounting:
hdiutil attach <path-to-DMG-file> -verbose -noautofsck -ignorebadchecksums -nomount
If any of these commands shows that the "disk image" is present when running the "diskutil" command
diskutil list | grep 'disk image' -A5
, then you do have access to the contents of the DMG file. If the Finder or command line is unable to see anything, then you may need to try using a data recovery app to see if it can access the data on the "attached" DMG.