I was trying to reset my computer to factory to give to someone and I deleted my operating system and I don’t see my original hard drive. I inserted an external and got the computer to turn on but how do I move it back to the internal hard drive so I don’t have to have the external?
Hello Hpwilliams,
Thanks for choosing the Apple Support Communities. It sounds like you may need to format your hard drive and create a new partition. To do that, try following the steps below.
Erase and reinstall macOS - Apple Support
"Erase and reinstall macOS
You can erase your Mac and use macOS Recovery, the built-in recovery system on your Mac, to reinstall macOS.
WARNING: Erasing your Mac removes all the information from it. Before you start, back up your Mac with Time Machine.
On a Mac with Apple silicon or an Intel-based Mac with the Apple T2 Security Chip
Your computer must be connected to the internet. If you’re reinstalling on a Mac notebook computer, plug in the power adapter.
On an Intel-based Mac without the Apple T2 Security Chip
Your computer must be connected to the internet. If you’re reinstalling on a Mac notebook computer, plug in the power adapter.
> Restart, then immediately press and hold Command-R.If you want to erase your Mac without reinstalling macOS, in order to restore it to factory settings before you trade it in or sell it, see Erase your Mac.
See also
Recover all your files from a Time Machine backup
Restore items backed up with Time Machine on Mac"
We hope this helps.
Cheers!
Hello Hpwilliams,
Thanks for choosing the Apple Support Communities. It sounds like you may need to format your hard drive and create a new partition. To do that, try following the steps below.
Erase and reinstall macOS - Apple Support
"Erase and reinstall macOS
You can erase your Mac and use macOS Recovery, the built-in recovery system on your Mac, to reinstall macOS.
WARNING: Erasing your Mac removes all the information from it. Before you start, back up your Mac with Time Machine.
On a Mac with Apple silicon or an Intel-based Mac with the Apple T2 Security Chip
Your computer must be connected to the internet. If you’re reinstalling on a Mac notebook computer, plug in the power adapter.
On an Intel-based Mac without the Apple T2 Security Chip
Your computer must be connected to the internet. If you’re reinstalling on a Mac notebook computer, plug in the power adapter.
> Restart, then immediately press and hold Command-R.If you want to erase your Mac without reinstalling macOS, in order to restore it to factory settings before you trade it in or sell it, see Erase your Mac.
See also
Recover all your files from a Time Machine backup
Restore items backed up with Time Machine on Mac"
We hope this helps.
Cheers!
Accidentally deleted operating system
