I was wondering if anyone could explain the meaning the command below in mac terminal:
Noticed it for the first time today and just wondering what it meant.
That line is called command prompt.
dhcp-74-148 is you hostname that you received from dhcp server.
~ is where you currently are (which directory) - tilda means you are in your home folder, /Users/[username]
: just separates hostname from current directory.
You can change format of command prompt by changing $PS1 variable. And - if you're interested - check out some bash shell tutorial for more information.