_DISK UTILITY comes installed on every macOS computer. It has many uses for media makers, including the capability to create encrypted file containersA file created as a copy of a storage volume or media. It is typically used to hold data for storage, or a compressed version of software.. Disk Utility refers to a file container as a disk image. The terms are interchangeable. After going through a few simple steps on Disk Utility, you’ll create an encrypted file container, where you can store files for your current project or any sensitive data.
Armed with a complex and unique password, a file container is a safe place to store sensitive files that would otherwise sit without extra protection in your computer’s storage.
Create your encryption passphrase, and store it somewhere safe.
You’ll need your encryption passphrase to access your encrypted container. It’s important that you use a passphrase that is complex, unique, and typeable. You can use a password manager, or dice, to generate a robust encryption passphrase.
Don’t lose access to the data on your encrypted device! Store your passphrase somewhere safe, like a password manager, or even on a piece of paper with a trusted third party.
Get started encrypting file containers with Disk Utility.
Follow the instructions in this Disk Utility encryption guide to create your first encrypted file container.