Encryption is good for protecting sensitive data you don’t want anyone else to see. The process of encrypting files is easy on Mac. I’ll to show you how to do it.
First, open up Disk Utility, go to File>New Image>Image From Folder.
Disk Utility will prompt you to pick a folder. Select the folder you want to encrypt, name it whatever you want, and choose 256 AES encryption.
Disk Utility will prompt you for a password. Don’t forget your password. If you forget the password, you probably won’t be able to recover your files.
When you click on that encrypted file, which will now be saved as a .dmg, it will prompt you for the same password you just entered.
Enter the password, and you’re in. That’s it. You’re done. All of your precious data is now protected by encryption.