Fraps Alternative for OSX

Take a look at arena's second life blog for a detailed tutorial on using Ambrosia's Snapz Pro X version 2.0.3 (Intel mac).
http://aeneaideas.wordpress.com/2006/12/02/machinima-in-sl-on-mac-os-x-a-tutorial/

http://www.ambrosiasw.com/utilities/snapzprox/