Important: Even after you empty the Trash, deleted files can be recovered using data-recovery software. To delete files so they cant be recovered, choose Finder > Secure Empty Trash. Files deleted in this way are completely overwritten by meaningless data. This may take some time, depending on the size of the file.
cheers man . so ppl that say that mac's are rubbish because if you delete a file it can never be found again are wrong !
(unless its securely deleted)