Macbook Pro Terminal Showing IP Location Instead of My Device or Localhost Name After @ Symbol

Your shell prompt string is pulling in the reverse DNS (address to host name) translation for your IP address as the host name, and what you see is what you got back from whatever server is serving your DNS responses here.

The PS1 bash prompt stuff will work if you’re using the bash command shell, but I’d guess you’re using zsh here as you’re probably using a more recently-created login, and the PS1 prompt and zsh shell and shell login and logout scripts are named differently and work a little differently than those of bash.

bash: https://kaushaldokania.github.io/posts/2020/02/how-to-customize-linux-ps1-bash-prompt/

zsh: https://voracious.dev/blog/a-guide-to-customizing-the-zsh-shell-prompt

The host name (DNS name) and local host name (mDNS name) and the “friendly” computer name used for Finder and some other displays are all set in System Preferences > Sharing, or can be set or shown from the command line.

To see or set the names from the command line, see:

man scutil

See HostName, LocalHostName, and ComputerName, etc.

192.168.0.0/16 is the smallest of the three blocks of IP addresses reserved for and commonly used for NAT’d networks. There are also three blocks reserved for documentation and for forum postings and testing, too. 192.0.2.0/24 is one. This is useful for posting around here.

And FWIW, the phrase “doesn’t work” is best considered reserved for end-users only. What you tried, what happened, what versions are in use, what error messages or diagnostics were shown if any, details matter to app developers and to IT folks. As you develop and support apps and servers, well, we all come to appreciate receiving these sorts of details, or a standalone reproducer, or other such problem reports.