OP:
Unless your dad has some compelling reason to use High Sierra, I'd advise him to stick with Low Sierra for now.
For many folks, it runs better with fewer headaches...
Looks like the installer is corrupted. The easiest solution would be to restore from the latest Time Machine backup, redownload the installer, and try again. If you don't have a backup, you could try reinstalling macOS by booting into the recovery partition (hold ⌘R on boot).
I had this problem recently when updating a MBP to High Sierra. I tried several times without success. I ended up formatting and doing a clean install and then brought back the personal files. If you have a current backup it's no problem, otherwise you should be able to boot off an external OS and copy the files you need.
How about attempting the directions? Restart the computer, hold ⌘R immediately after turning it on, from there restore the backup or reinstall macOS. You won't accomplish anything if you do nothing.I wish that was the case but i cant exit out of it there is no x or exit or anything, i searched and couldnt find anything. Heck, i even restarted the mac and it would go back to the same screen.
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I wish that was the case but i cant exit out of it there is no x or exit or anything, i searched and couldnt find anything. Heck, i even restarted the mac and it would go back to the same screen.
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I wish that was the case but i cant exit out of it there is no x or exit or anything, i searched and couldnt find anything. Heck, i even restarted the mac and it would go back to the same screen.
You could copy individual files using Terminal but there is no way to do it in the graphical interface of the Recovery Partition. Reinstalling macOS will not remove any data. You cannot eject the "OS X Base System" as that is the partition that you are booted to.So I went to disk utilities, I was wondering if I could copy individual files to a USB and then reinstall mac os? Also what happens if i eject OS X Base System?
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You could copy individual files using Terminal but there is no way to do it in the graphical interface of the Recovery Partition. Reinstalling macOS will not remove any data. You cannot eject the "OS X Base System" as that is the partition that you are booted to.
Holding ⌘R will boot into the recovery partition and doesn't make any changes in and of itself.Okay so I can hold command r while it's booting and nothing won't happen?