All you need, I think, is the Mac version of UT2K4. I didnt play this mod on it but it handled every other mod I played just fine from what I remember. The PC version in Bootcamp was much smoother however but thats about how it was ported to Mac and it has been several years since I played it on that machine.
I had a prototype Redeemer of sorts long ago and it was pretty cool. Used an AT4 as the launcher. You used the sights to fire a targeting laser of sorts on a wall or something. Distance was measured, which after that calculated a flight time. When you fired in any direction when the timer runs out it exploded in the air. Also certainly had to look for impacts in case it hit something before the timer expired. The explosion fx was a crude version of the mininuke fx before I made up that streak. If you listen, the 'implosion' sound is from UT.