Write down the recovery key, in case you forget it. There are two options that you can use, iCloud or a generating a local recovery key.
You will have to choose a recovery method now.Now click on the Turn On FileVault button.Navigate to the FileVault tab, it is next to the general tab.Choose Security & Privacy by clicking on it.Click on the Apple icon that is located at the top left corner of your screen.
Follow these steps to use FileVault and hide files on your Mac: You can FileVault, it is a feature in Mac that can help your hard drive to be accessed only using your password and admin. This is the easiest way to hide files on your Mac as you don’t have to code and stuff unlike some other methods.