Free program for 'unformatting' a CF card

so my sister was borrowing my camera and returned it without downloading her images, i figure, who returns a camera without downloading their images and i formatted it. Nothing has been recorded since the format but I am wondering if anyone can suggest a free program for mac that will let me unformat those images. in my understanding this is possible, right ?

Haven’t tried it, but lots of positive reviews from users… … 11792.html

Other suggestions at … mncol;page

I’ve had a lot of success with testdisk on the Mac.  If you are in Rupert and need help with this, let me know (PM or e-mail).  I also have Data Rescue and a few other things.