I've been having some problems getting it to work.

It crashes immediately on login with certain characters of mine, and less immediately with others.  Many textures show up as black (it isn't a lighting problem, to my knowledge, but a graphics problem).

When it crashes, it takes the entire computer with it--force quitting isn't an option, I've had to restart the computer several times.

It's a 2Ghz intel dual core, Radeon 1600 graphics card, 1 gb RAM. (If you need more then that, I can provide more, it's what seems necessary.  Messages are useful).

I Been having the exact same problem with my intel *freezes computer after loading world*
Chaos guide does stat that it only works on Power macs and and mini intel mac. So I guess we other intel users still have to be patient.

planeshift.setup.application:
  Application initialized successfully.
Crystal Space for MacOS/X 1.1.0 [MacOS/X-x86-GCC]
Ported to MacOS/X by Eric Sunshine <sunshine@sunshineco.com>

DEBUG: Sound System Software Renderer Initializing...
DEBUG: Sound System: CoreAudio driver for software sound renderer initialized.
Depth 15 not supported in CGDriver2D yetALERT: crystalspace.graphics3d.opengl:  Error opening Graphics2D context.

crystalspace.graphics3d.opengl:  Error opening Graphics2D context.
Depth 15 not supported in CGDriver2D yet
planeshift.application.client:
  PlaneShift Crystal Blue
  This game uses Crystal Space Engine created by Jorrit and others
  1.1.0 [MacOS/X-x86-GCC]
  Failed to init app!
Crystal Space for MacOS/X 1.1.0 [MacOS/X-x86-GCC]
Ported to MacOS/X by Eric Sunshine <sunshine@sunshineco.com>

DEBUG: Sound System Software Renderer Initializing...
DEBUG: Sound System: CoreAudio driver for software sound renderer initialized.
Depth 15 not supported in CGDriver2D yetALERT: crystalspace.graphics3d.opengl:  Error opening Graphics2D context.

crystalspace.graphics3d.opengl:  Error opening Graphics2D context.
Depth 15 not supported in CGDriver2D yet
planeshift.application.client:
  PlaneShift Crystal Blue
  This game uses Crystal Space Engine created by Jorrit and others
  1.1.0 [MacOS/X-x86-GCC]
  Failed to init app!
Crystal Space for MacOS/X 1.1.0 [MacOS/X-x86-GCC]
Ported to MacOS/X by Eric Sunshine <sunshine@sunshineco.com>

DEBUG: Sound System Software Renderer Initializing...
DEBUG: Sound System: CoreAudio driver for software sound renderer initialized.
Depth 15 not supported in CGDriver2D yetALERT: crystalspace.graphics3d.opengl:  Error opening Graphics2D context.




I don't know if that reveals everything since most of the time my computer freezes and I have to manually reboot my computer. Anyway I hope it helps.