"http://www.cleverfiles.com/mac-data-recovery.html
stop using the drive and use disk drill. like now."
I'll second axu539's post.
Get DiskDrill and get it TODAY.
DO NOT use the drive in question any more UNTIL you run data recovery software on it.
IMPORTANT IMPORTANT IMPORTANT
You cannot "recover" files to the same drive.
You MUST have a SECOND "scratch" drive to which to recover the data.
If you don't have a second "clean" drive to serve as your scratch drive, here's what you need to buy, and buy it TODAY:
First, get one of these:
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=aps&field-keywords=usb+sata+dock&x=0&y=0
(various items shown, just pick the one that you like best)
Second, get a "bare" drive of the same (or greater) capacity than the drive from which you're trying to recover the files. I recommend newegg.com as a reliable vendor and I recommend Seagate as the drive of choice.
And third, download the DiskDrill software as well.
More "important" stuff...
Do you currently have a second, bootable drive?
If YOU DO have one, put DiskDrill onto that and use it as your "platform" from which to do file recovery. Otherwise, once you have the above materials, you need to do this:
- Hook up the usb/sata dock, put the bare drive into it, get out your original OS X installation DVD, boot up from the DVD.
- From the DVD, launch Disk Utility and "aim it" at the new drive in the dock.
- Initialize the bare drive, then partition it into TWO partitions (could be more if you wish, but you'll need at least two). The first partition needs to be about 20+ gigs in size (it will contain a bootable copy of the System). It can be larger if you wish. The next partition can be whatever space is left on the drive -- this will serve as your "scratch space".
- Now install a clean copy of the System onto the new "boot partition".
- When that's done, boot from the new boot partition (press restart, hold down the option key and keep holding it down until the startup manager appears, then use the arrow keys to select the drive you wish to boot from)
- Create a new account. I STRONGLY SUGGEST that you use THE SAME username and password as you use on your "regular" drive.
- Use software update to download the "combo" 10.6.6 update, and then run it on the new boot partition. This will result in a new, clean, and up-to-date copy of the system.
- Now, launch DiskDrill, aim it at the problem drive, and see what options it offers you.
Yes, you MUST get a separate drive for file recovery.
And yes, it DOES take A LOT of effort and a good deal of learning to get the files back.
One more thought:
Next time, if you have files that are important to you, KEEP A BACKUP.