I am trying to open a DMG file to install an OS X app. I get the error
The following disk images couldn't be opened. Invalid Argument. I have tried to open other DMGs that I successfully managed to mount earlier and they are failing too. So the issue is not with the current DMG only. I restarted and that did not make a difference. I ran First Aid in DiskUtility and it reported that my drive was corrupt and needed repairing. I therefore restarted my mac with cmd + r pressed, selected Disk Utility and ran the repair. The repair failed after running for about 5 minutes. I would like to keep the contents of the drive if a solution exists that allows. What should I do now?
I did a time machine backup and let the iMac go get its drive formatted etc. I then attained a macbook air, and did a Restore From Time Machine onto it such that I have back where I left of on the iMac. I then tried to open a new DMG,
and the same error came up. I ran First Aid on the mac air drive and it reported it to fine (Ran Successfully).
This is therefore not a drive issue right (first aid on the mac air succeeded)? What could it be, and how can I fix it.