Recently (Fall 2020) I was able to purchase an old MacBook Air for my daughter to use. It is an older device, but working just fine for what she wanted. The original owner had not removed his account, and I had no admin password, so I decided to just do a reinstall. Very bad move on my part.

• Burn DMG to USB https://www.androidphonesoft.com/resources/burn-dmg-to-usb-drive.html
• Restore a full-disk .dmg file to raw block device http://hints.macworld.com/article.php?story=2009041216314856
• check status of dd https://www.commandlinefu.com/commands/view/11666/check-the-status-of-dd-in-progress-os-x
• Resize Mac HD Partition https://medium.com/@kepler.donald/how-to-resize-a-mac-hd-partition-to-utilize-the-available-free-space-c4aac79b6347
• Discussion of OSX Installation Issues https://www.ifixit.com/Answers/View/601830/re+installing+OSX+problems
• Mount DMG from CLI https://osxdaily.com/2011/12/17/mount-a-dmg-from-the-command-line-in-mac-os-x/
• Restore OS from Time Machine backup https://support.apple.com/en-us/HT202406
• Mac Startup Key Combinations https://support.apple.com/en-us/HT201255