This is how you control the mouse programmatically under Mac OS X

mouse_click.py

import time, sys
from Quartz.CoreGraphics import CGEventCreateMouseEvent
from Quartz.CoreGraphics import CGEventCreate
from Quartz.CoreGraphics import CGEventPost
from Quartz.CoreGraphics import CGEventGetLocation
from Quartz.CoreGraphics import kCGEventMouseMoved
from Quartz.CoreGraphics import kCGEventLeftMouseDown
from Quartz.CoreGraphics import kCGEventLeftMouseUp
from Quartz.CoreGraphics import kCGMouseButtonLeft
from Quartz.CoreGraphics import kCGHIDEventTap

def m_event(type_, x, y):
        e = CGEventCreateMouseEvent(None, type_, (x, y), kCGMouseButtonLeft)
        CGEventPost(kCGHIDEventTap, e)

def m_move(x, y):
        m_event(kCGEventMouseMoved, x, y)

def m_click(x, y):
        m_event(kCGEventLeftMouseDown, x, y)
        m_event(kCGEventLeftMouseUp, x, y)

x, y = int(sys.argv[1]), int(sys.argv[2])
e = CGEventCreate(None); cur_pos=CGEventGetLocation(e)
m_click(x, y);
time.sleep(0.2);
m_click(x, y);
m_move(cur_pos.x, cur_pos.y)