Computer print on RP 3700

[Guest]

Hi
I want to print with my new RP 3700 from a computer.
I don't have extra rip.
I think I can't print from a mac (OSx)
Do I need to buy an old pc?
I am really bad with the all network stuff, but when i have the suitable computer, can I throw postscript files directaly in the rip of the machine?

I have to admit I really have no idea the way i could work.

thanks