I do not know what happened, but before I had I kind of sync between macOS settings for local hostname and the host name I see in the terminal app. For instance if I change host name in settings it automatically updates terminal. At some point it stopped to work and I do not know how to bring this feature back.
MacBook Air 15″
One thing I do in my Zsh startup file (~/.zshrc) is ensure that my prompt is always my local hostname, and not a supplanted reverse DNS host name provided by a VPN. My free University VPN service for alumni was recently elimninated as an Alumni service, so I am not now using VPN.
# don't want VPN DNS changing my hostname
MyHost="$(networksetup -getcomputername)"
PS1="${MyHost}: %~ %# "
and my Zsh shell prompt becomes:
odin: ~ %
This would work in the Bash shell's ~/.bash_profile or ~/.bashrc as well with adjustments for Bash PS1 syntax.
MyHost="$(networksetup -getcomputername)"
export PS1="$MyHost: \w $ "
If you don't know what caused the change, we don't either, and my solution does work regardless of the shell in use.
FWIW I have the exact same problem and I have restarted entire system and terminal and I cannot get the hostname to pick up the current name from the settings area on my new Mac.
On both the new Ventura Settings General About I have the correct name. And the correct name is showing in Settings General Sharing but it's STILL not showing up properly in the terminal app.
echo $PS1
%n@%m %1~ %#
I use zsh with no .zshrc configuration, with now package manager installed
Basically, it does not follow the hostname from settings even with fresh MacOS install
How to make terminal to follow local hostname from settings?