iMac preparation/erase hard drive and reinstall Mac OS
I need to get my iMac ready to send back for the trade allowance towards the new Mac Mini.
When I try to go into macOS Recovery, the iMac will not do that after restart.
I hold the Command and R keys, nothing, I hold the Command + R keys, nothing.
I let go when the Apple logo comes up. No spinning wheel comes up. And no recovery window. Comes up as if just a normal restart.
So I try just disk utility and that start to erase the hard drive, then quits.
There is a photo below of what appears when I try to erase the hard drive.
The mac I am trying to erase is shown in the photo provided.
Any help would be greatly appreciated. I need to erase the hard drive and reinstall macOS to get the value I was quoted for my trade.
Thanks in advance...
Photo 1: Trying to erase the hard drive.
Photo 2: iMac info.
iMac Line (2012 and Later)