Most of the time accidental deletion is a common reason of data loss from Mac Computer or Laptop. Mac file recovery is easy when files get deleted by using "Delete" key on Mac, but the use of "Command + Delete" key removes files directly and it can't get stored in Mac Trash. In this difficult scenario you can take help of Time machine for Mac file recovery. If you have a updated backup than it is the easiest way to restore deleted files. If any one thinks that it is not possible to get back deleted files without backup then it will be a wrong perception. Mac file recovery can be possible even after using "Command + Delete" key because this action deletes only index entry from the directory of file system but the content of files still remains on the drive. Mac OS X can't read these files without address allocation and the file system assume these occupied space as free. So it can store new files on the same location and thus a permanent deletion take place. If you have just lost the files and it has not been overwritten yet than a specially designed third party software can read the content of these deleted files and perform a Mac file recovery.