We usually protect the access to our computer by means of a password, but we all know that this method isn't that secure. If you don't want anyone meddling with your computer, it's important to find a more reliable alternative.
Your face is your safest password.
After installing KeyLemon you'll only be able to access your computer when the webcam detects an authorized person. Instead of having to type in a password, this program analyzes the geometry of the person's face and compares it to an image saved previously. If the person is known, he'll be able to access the desktop, otherwise the computer will remain blocked and the intruder will have his photo taken.
How it works is really easy and can be configured following a few simple steps. Furthermore, the program is also capable of checking whether we're in front of the computer, and if not, it blocks it.
Therefore, if you want to restrict access to your Mac and protect your privacy, don't hesitate to install this program.