If ya have no clue what the heck you're doing (like me), here's
a few hints:

On this part:

ObjectDriver DBI::mysql
Database 'database_name'
DBUser 'user'

Do NOT include the '' marks around the supplied info, for
instance:

Database movabletype
DBUser root

If ya don't have MySQL installed, you can do it very easily by
just following this link:

http://www.entropy.ch/software/macosx/mysql/

This guy covers it really well. All ya hafta do really is go to the
mysql page and download the package for 10.2

And, finally, on the

mt-db-pass.cgi

file,

I'd seriously suggest entering the password you established when
you set up mysql and leaving the DBUser variable (mentioned
earlier) as root.

Also, make certain you didn't install anything from the
AaronFaby unix install sets - they're all "bleeding edge" and are
extremely confusing. I'm sure he's a nice guy, but his
installations are so 'nouveau', you'llj probably never get your
webserver to work. Most of his installs begin with the word
"Complete" in them. Again, I'd seriously suggest you avoid
these - they've cost me untold hours.
But luckily, he has been cool enough to provide complete de-
install instructions in all his packets. Just examine the install
pdf's that come with the installs.
The only reason I mention this is that most of my problems
were in dealing with Apache4 and other stuff that I had installed
from his site. On VersionTracker, it sounds SOOO good - we
always want the latest stuff, right? But this apparently doesn't
hold true for UNIX webserver type apps. Yikes...

Hope this helps.

MacZealots.com has written a fairly lengthy and in-depth article detailing exactly what you will need to do to get Movable Type up and running on Mac OS X Panther v10.3.x

This may provide help for some of you that might be having problems, would like more detailed instructions or further discussion.