Extract Stuffit'ed mac version

(EDITED POST)

There's no apt packet for stuffit as it's not free/opensource. The only version you can download is there:
http://www.stuffit.com/unix/index.html

However you'll notice it will give you access to StuffIt version 5 (fyi version 8 is the current one from what I've read on the Win32 forum).

So only way to get it working : unpack it on a windows compuer or use wine

stuffit for windows worked fine for me, so perhaps you have a corrupt download?

I thought that and tried to redownload the file but it didn't work :/

I'll try to download the version which is on my home computer at work (windows computer) and check if it works :)