Once the copy is finished, right-click (or control-click) the mounted drive on your desktop and choose "Eject". Downloading Older macOS DMGs
Click the download link from your browser. Safari typically saves these to the Downloads folder, which you can access via the Dock or Finder. Download MAC dmg
are also available through archive.org. Troubleshooting Once the copy is finished, right-click (or control-click)