Mac encrypted folders can be implemented in three ways: one is to use disk images to create an encrypted .dmg file through "Disk Tools" and enter a password to access it; the second is to enable FileVault to encrypt the entire user account and protect all personal data; the third is to use third-party tools such as Espionage, Cryptomator, etc. to provide a more flexible encryption solution. The first two are the system's own functions, which are more secure, so it is recommended to choose first.

Encrypting folders is not actually complicated on Mac, but many people may feel a little confused at first. Simply put, the Mac itself does not have the ability to "encrypt folders with one click", but you can achieve similar effects through several practical methods, such as using disk images, FileVault, or third-party tools.

The following are several common methods suitable for users with different needs.

Encrypt folders using disk images

This is a very practical feature that comes with macOS and is suitable for most ordinary users.

1. Open Applications → Utilities → Double-click to open Disk Utility.
2. In the menu bar, select File → New Image → Create Image from Folder.
3. Select the folder you want to encrypt and click "Save As" to name your encrypted image file.
4. Set the encryption method (AES-128 or AES-256 is recommended), enter the password and confirm.
5. Click "Save" and wait for the .dmg file to be generated.

After that, you only need to double-click this .dmg file and enter your password to access the encrypted content. When not mounted it is just an encrypted file and has high security.

Note: Remember to set the password, if you lose it, you will really not be able to find it.

Enable FileVault to encrypt the entire user account

If you want to protect all personal data, not just a folder, consider turning on system-level FileVault encryption.

• Open System Settings → Privacy and Security → Click the "FileVault" tab.
• Click the lock icon to authorize, and then enable FileVault.
• The system will prompt you to save the recovery key, or you can choose to let iCloud manage it for you.

After turning on, you can access the data only by logging into your account, which means that the entire user directory is encrypted. This is a great choice for people who often carry their laptops out.

Third-party tools: a more flexible or simpler way

If you don't want to use disk images or FileVault, there are some third-party applications that can simplify the encryption process:

• Espionage : Designed for encrypted folders, integrated Finder, and supports automatic encryption.
• Cryptomator : Open source is free, supports cross-platform, and can be synchronized to the network disk while encrypting.
• Boxcryptor : Suitable for users who need to frequently share encrypted files with others.

These tools have their own characteristics and can be selected according to their use scenarios. However, it is recommended to give priority to the official method, after all, the security is more guaranteed.

Basically, there are only a few common ways. Each type has applicable scenarios, just choose the one that suits you the most.

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