I just upgraded Movable Type to 2.6.3 (from 2.51). I made sure I backed up all my files (db folder, mt folder, blog folder) first using Transmit 2.3, my choice for best Mac OS X FTP client. I also exported all my entries.

I'm also attempting to duplicate my Movable Type and Gallery (hosted on a US-based Linux server) on my local machine, a (company-owned) PowerBook G4/400 running OS X 10.2.4. I got Movable Type already installed and working but getting all my existing entries, categories, and templates over and working is proving difficult. We'll see.

I was plesantly surprised at how easy it was to get Movable Type running on OS X. All I had to do was activate Apache by ticking the Personal Web Sharing checkbox in the Sharing => Services preference pane. Perl 5.6.0 was already installed. I then installed Movable Type as normal but this was much easier because I was doing it locally — no FTPing and issuing commands via SSH. Oh, I even got ImageMagick 5.5.4 and PHP Apache Module 4.3 installed very easily by using Marc Liyanage's free UNIX Ports Packages. Thanks, Marc!