Good thing, you can securely empty the trash and destroy the files at the same time. This leaves all your important deleted contents susceptible to the identity or data theft.
In case you run a recovery using a professional software, you will still see traces of these files intact.
Now you have successfully emptied the Trash bin on your Mac, but did you know that those files are not destroyed? They were only deleted but are still subject for overwriting when Mac needs a space to use. There is another method that would let your Mac empty the trash folder by default by changing the system preferences and let it erase files securely: You can empty the Trash from any open Finder window by holding down the Command+Shift key and press delete
Check out how to empty trash on Mac in the next part below. They are stored inside the Trash bin and remains in there until you finally empty out the Trash folder. However, these methods do not exactly delete the files off your Mac.