Hi there Simon
Not being a mac user I cant help you out with the right click, ive just checked to see if I have thatoption and I dont??
Ohh well, what I usualy do is create a renderfile using a text editor like notepad, I then save it as a .bat file and then use that to render as it allows you to render multiple files, heres a tutorial on it
"No pressure, no diamonds" Thomas Carlyle