I have a Recoil controller like this http://i17.ebayimg.com/01/i/000/c1/96/9af0_1.JPG
I want to know if i can play nexuiz with the controller. I'm on mac 10.4.

As controller - yes, at least on Windows you can use it, no idea if a Mac supports it as a "joystick". You may have better chances with Nexuiz-SDL.

However... don't expect good results. You will have very bad aim with a gamepad.