after erasing HD, os will not install
I'm trading in my iMac and after erasing the HD, it's not allowing a new OS install.
iMac Line (2012 and Later)
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What to do before you sell, give away, or trade in your Mac
Use Disk Utility to erase an Intel-based Mac
How to reinstall macOS This will require an Internet Connect and preferred via Ethernet Cable to Router
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.