the old CUT used to work fine on my mac but the new version doesn't. i have a Quicksilver G4 running OS X. i used the .zip installation. i followed the installation directions and no Chaos mutators show up in the window. the maps from the map pack show in the map windows but no Chaos game types...
go back to the zip and use the "Extract All" option and point it at c:\ut2003 or whatever macs use. If it still doesnt work try the umod and do the same. The umod should be compatible with both OSes.
I make Darth Vader look like a teenage punk with a lightsaber.
usally that means that there was some issue with the install. Can you fire up a game and then send us your UT2003.log file? That should give us the clues we need to help you get it to work. Sorry for your trouble.