How To Open A Dmg File Without Password


You may have sensitive files like documents, images, videos, voice notes, that you want to keep private from friends and family (if they ever happen to use your Mac). Thankfully, it is effortless to put a password on a folder to shield it from others. So, without further ado, let’s get to the steps and show you how to encrypt and password protect a folder on your Mac.

How Do I Password Protect a Folder on Mac?

  1. Open Disk Utility. For this, open Finder → Applications → Utilities → Disk Utility. Or, press Command + Spacebar to open Spotlight Search and type this app’s name.
  2. From the top menu bar, click on FileNew ImageImage from Folder.
  3. Now, select the desired folder you wish to lock and click on Choose.
  4. Optional: For ‘Save As:’ continue with the same name, or you may also change it. Click on ‘Where:’ and choose the desired location to save the disk image. You can move it later as well.
  5. Important: For ‘Encryption:’ choose 128-bit AES encryption (recommended). The second option here (256-bit) is slower. Please enter the desired password, re-enter it to verify, and finally click on Choose.
  6. Important: Click on ‘Image Format:’ and choose read/write.
  7. Finally, click on Save.

Double-click on DMG file to open DMG file with Easy 7-Zip You will see files or folders within the DMG file then, click button Extract to extract the DMG file. Alternatively, Right-click on DMG file on Windows Explorer And then, choose Extract files., Extract Here, or Extract to 'folder' to extract the DMG file.

  1. If you are referring to the mac os x built-in.dmg file encryption, there is no way to get your data back without the password.
  2. Downloaded a DMG file but your Windows PC can't open it? This short guide shows you how to do it for free using DMG Extractor.

You have successfully created a disk image (.dmg file) that is protected with a password. Now, let me show you how to use it.

How To Unpack A Dmg File

How to View and Re-Lock the Password Protected Folder on Mac

  1. Locate the .dmg disk file.
  2. Double click to open it.
  3. You will be asked to enter the password. Type the same password you used while creating the disk image and click OK. (Note: Do not check the box for ‘Remember password in my keychain.’ If you do, it may defeat the purpose. The saved password will fill in automatically if someone has your Mac or knows its password.)
  4. After you enter the password, you will see a disk image on the desktop. It looks similar to an external pen drive. Double click to open it, and you will see the contents in it.
  5. Important: Now, delete the original folder so that the content inside it is removed from your Mac and is only available inside this password-protected disk image.
  6. To re-lock the protected folder, right-click and choose Eject “Folder Name.”
  7. To reopen it, follow the same process from step 1.


  • This disk image will have almost the same capacity as the size of the original folder. You can freely delete existing content inside it and replace it with other content.
  • Do not delete this .dmg file. If you do, everything will be lost.
  • If you want to permanently remove the locked folder (and its contents), open Disk Utility, → choose the disk image from the left sidebar, → right-click on it, and choose ‘Delete APFS Volume.’

Signing Off

This is how you can quickly, safely, and freely lock a folder with a password on Mac. I hope this guide was helpful, and you learned something new.

You can also use third-party apps like Encrypto to encrypt and put a password on individual files and folders.

Want to know more? See how to password protect PDFs and lock notes on Mac.

Finally, here’s an additional tip for you. If you do not want the folder to show up in Spotlight Search, add .noindex after the folder name.


What Is A Dmg File

How To Open A Dmg File Without Password

I have been an Apple user for over seven years now. At iGeeksBlog, I love creating how-tos and troubleshooting guides that help people do more with their iPhone, iPad, Mac, AirPods, and Apple Watch. In my free time, I like to watch stand up comedy videos, tech documentaries, news debates, and political speeches.

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