How to Encrypt a Folder on Mac Without Additional Applications

Encrypting folders on a Mac is simple and does not require any third-party applications. Follow these steps using the built-in Disk Utility program on macOS.

Step-by-Step Guide to Encrypt a Folder

1. Open Disk Utility:

   Navigate to Applications → Utilities → Disk Utility.

2. Select Folder for Encryption:

   In the top menu bar, click File → New Image → Image from Folder.

3. Choose the Folder:

   Browse and select the folder you want to encrypt.

4. Set Encryption and Image Format:
   • In the Encryption field, select 128-bit AES encryption (recommended).
   • Enter a secure password when prompted.
   • Set Image Format to Compressed.
5. Save the Encrypted File:

   Choose a destination to save your new encrypted .dmg file. Once the process is complete, the file will be created.

6. Delete the Original Folder:

   After verifying the .dmg file works, delete the original unencrypted folder for security purposes.

How to Use the Encrypted Folder

1. Open the .dmg File: Double-click the .dmg file and enter the password you set during encryption.
2. Access or Modify Files: You can read or modify the files as needed.
3. Eject the Disk Image: Once done, make sure to eject the .dmg file to ensure your data stays secure.

Conclusion

Using macOS's Disk Utility, you can efficiently encrypt folders without installing additional applications. This method is simple, secure, and effective for protecting your sensitive data.