How to transfer minecraft sp from one mac to another?

So i think i might sell my mac and i downloaded a free 1.5.2 mine craft and it is mine craft sp i find any files that have anything to do with mine craft i really want to still have my mine craft world is there anyway that i can still have it i just have a big world with a lot of stuff and i don't want to lose it. Thank you all for your answers even if there isn't a way

Yeah, there's a way. What you have to do is press the windows key and R at the same time, and type in %appdata% Then you will see a.minecraft folder. Just put that on a usb stick or the new computer! Hope this helps!