Iv looked around everywhere for a extracter that can extract maps on a mac/linux machine for arcemu. What i found (dont know were i got this) was a maps extractor for mangos maps.
Mac/Linux ONLY!
Instructions:
FIRST:
Download the file here.
unzip and place it in your World Of Warcraft folder.
SECOND:
open up Terminal, or a shell, and cd your World of Warcaft folder.
THIRD:
type ./ad then enter
wait and when the progress bar is done, open up your WoW folder and you will see a folder called "maps"
Have fun!