Maxjet2012

OMG PLEASE SOMEONE HELP ME... Today my technic wasn't launching tekkit... so i reinstalled tekkit.... and i DIDN'T BACK UP ANYTHING!!!! and i forgot about my saves on there..... There is a huge project ive been working on for months for a server and its just completely gone D:... please someone help me get the save back! Ive downloaded Data Rescue 4 but i cant get the save back D: . I am using a Mac but if you only know windows i can try to do it on Mac... please help as soon as possible i really really need this save back... im about to go mental and flip my desk XD.