mac and mysql

Mac users, please forgive such a Windows-centric question, but I need your h
elp. And you can educate me in the process. I am helping a student of mine s
et up a development environment with php, mysql, and a webserver, and she us
es a Mac. Are there any ins
tallation issues unique to mac that I should warn her about?

Can you recommend a simple web server - she is brand new to server-side work
 and I am trying to make this as painless as possible. Usually I recommend t
hat students use Xitami, but I don't believe it comes in a Mac flavor. Does 
the Mac OS come with a serv
er, such as IIS on Windows? Does apache work well with Mac? Is there anythin
g simpler?

And here's a question I've never thought about. If she installs MySQL on a M
ac, and she wants to admin the server through a command line --- does Mac ha
ve a command line tool to work with? Typically, when you think command line 
you think of the old dos pr
ompt. What does the Mac have that will give us command line access?

Again, please excuse my ignorance, but here is an opp to educate those of us
 stuck in a MS POV. Thank you in advance.

Michael