Mac help

i read this https://www.romulation.org/forum/index.php?topic=3880.50 and downloaded the mac extractor but it does not show "extract" as an option,am i doing something wrong?

Try Stuffit.

try 7zipMac download: http://web.me.com/krmathis/applications/p7zip%204.65.dmg

this should be in technical help shouldnt it?