I've got it running, well, everything works except videos, on 10.6 using these steps.
Install the latest beta from Redlum: http://ps3mediaserver.org/files/pms-mac ... a-r356.dmg
It has configs built in for your TV (and other "renderers").
If you are running the Mac Firewall, turn it off before launching PMS, turn it back on after launch/detection of your TV.
The screen will look like this once the connection is made:
Under the Navigation/Share Settings tab I have "Show iPhone Library" and "Show iTunes Library" checked so I can browse those on the TV. Keep in mind that even though all these different types of media folders will show up in each section of the Cross Media Bar on the TV, each media type will only work where they should. i.e. you can only play music when under the Music menu on the TV, etc.
I moved all my movies to a single folder and added that folder under the Shared folders menu. That way my entire mac isn't viewable on the TV, only one folder. Alas, movies won't yet play on my TV. I get a "No Items to Display" message when I try. Some day I think I'll get it to work.
Also, each time you restart PMS on your Mac you will get a new server icon on the TV. You have to delete the old one manually from the settings menu on the TV. I have a modified file I got from someone on the board that fixed this for me. I'll find the link if you want it.
I'm no expert at this program, but that's what is mostly
working for me.