So, when you empty your trash bin, the files are not completely deleted from your hard drive. To put it simply, this deletion means that every link associated with that file is eliminated from the directory listing. This means that the file cannot be accessed in an ordinary way. With this action, you are freeing up space on your drive. But, until this free space is not filled with new files and data, these deleted files are still available in the same space. So, they can be recovered with the help of a reliable Mac data recovery software solution. These programs are able to scan the hard drive and locate all the data in its original form. This is definitely a very convenient option for users who have accidentally deleted files. Thanks to these programs they can locate and recover lost files in a matter of minutes. It’s good to know that while these software programs are operating, Mac users should not use their computers because they can disrupt the process. In this way, you can rest assured that the old files you are trying to recover are not replaced with new ones. Obviously, the best idea is to open this recovery program as soon as you notice that some file you need is missing. A good data recovery program for Mac should be simple to use and it won’t cost you much. Most of them have trial version or free and pro versions, so you can try how they work.
The vast majority of these programs come with a wide range of features and options for smooth recovery. They can scan the drive and identify all the deleted files that can be recovered. What’s even better, these programs can be fully customized and users have full control of the recovery process. As we already said, data loss on Mac can be triggered by many things – Mac crashes, accidental deletion, viruses etc. Regardless of the cause, these Mac data recovery tools can bring back lost and missing files into life. Of course, Mac users can always call a professional company and ask for some of their technicians to help them out, but the fact is that their services are expensive. On the other hand, Mac data recovery tools are inexpensive, easy to use and you can use them whenever you want.
re: http://www.uflysoft.com/blog/2016/10/12/an-introduction-to-mac-data-recovery