Change system names on macOS
From term (or equivalent), copy and paste:
To change your public Host Name (i.e., jeff.oozou.com):
sudo scutil --set HostName "New Name"
To change your local Host Name (i.e., jeff.local):
sudo scutil --set LocalHostName "New Name"
To change your Finder Computer Name (i.e., Jeff's MBP):
sudo scutil --set ComputerName "New Name"
Finally, flush your DNS cache to force refresh:
dscacheutil -flushcache
