I followed Apple's instructions for this process through erasing the hard drive. I think I did it correctly, but when restarting iMac to install operating software, the screen is blank white with a circle, with a slash through it, in the middle. I inserted my original software disk into slot. Nothing happens and disk does not eject.
iMac 21.5″, macOS 10.12
I learned that I was holding down the wrong keys at one point in the process. When I learned that only the R and command keys should be held down at that point, I was able to begin completing the process of reinstalling the operating software. That just completed successfully a few minutes ago. I did get help from Apple support via telephone which led me through the process. Thanks for the reply.
Did you hold c key or alt key on startup?
Good work, great news, take care my friend. :)
Giving away your iMac, erasing hard drive and reinstalling operating software
