I needed a programmatic way to figure out my local and public IP address for a WebRTC app. I’m also using Tailscale so in case I was connected to it I want to use the Tailscale IP instead.
These commands worked for me on macOS 12.6 Monterey:
Local IP
ifconfig | grep "inet " | grep -Fv 127.0.0.1 | awk '{print $2}'
Public IP
dig +short myip.opendns.com @resolver1.opendns.com
Tailscale IP
tailscale ip --1
(Use tailscale status to determine if you’re connected or not.)