By following the steps below, you will create a password protected disk image (DMG) folder on a Mac.

Now, click 'Save Password' and then click on the red Close button in the top-left corner to exit the Preferences. From the Preferences menu, create your password (something that you won't forget), and if you have a MacBook with Touch ID, you can also check the 'Enable Touch ID' option. Here, click on the 'Setup My Password' button.

Click the Finder app icon, which resembles a blue face, in your Mac's Dock. This wikiHow teaches you how to create a password-protected disk image (DMG) folder on a Mac.

Important: Click on ‘Image Format:' and choose read/write.

Please enter the desired password, re-enter it to verify, and finally click on Choose. The second option here (256-bit) is slower.

Important: For ‘Encryption:' choose 128-bit AES encryption (recommended).

Click on ‘Where:' and choose the desired location to save the disk image.

Optional: For ‘Save As:' continue with the same name, or you may also change it.

Now, select the desired folder you wish to lock and click on Choose.

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

Or, press Command + Spacebar to open Spotlight Search and type this app's name. For this, open Finder → Applications → Utilities → Disk Utility.

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