To mount the image again, simply double-click on the disk image you created. When you are finished, make sure you unmount the image by dragging its icon to the trash or selecting the eject button next to its icon in any finder window. Anybody could walk up to your Mac and mount the image!Īfter the image is created, it will automatically mount for the first time. If you don’t uncheck this box, it defeats the purpose of the encrypted disk image. Make sure you uncheck Remember password (add to Keychain). Once you save your image, the Disk Utility application will prompt you for a password. Name your image and click Create to save it. Make sure you select the AES-128 (recommended) option under the encryption menu. This will provide plenty of room, and the image will fit perfectly on a CD if you want to back up your data. There are many options, but we recommend using the 610MB (CD-ROM 74 min) option. Select the size you’d like the encrypted disk image to be. Or, you can click the New Image icon on the toolbar. You can find this in Applications > Utilities.įrom the File menu, select New Blank Image. Anyone wanting to open your disk image will have to type your password to view its contents. Once you have copied data to the mounted disk image, you can unmount the image and secure it. Once authenticated, the disk image will mount on your Mac as if you had inserted a CD or USB flash drive. When you double-click on this file, Mac OS X will prompt you for a password. What is an Encrypted Disk Image?Īn encrypted disk image is a file that is 128-bit encrypted. You can encrypt and save many of your secret files into one file that is password-protected, and you can even burn these files onto CDs to securely transport your top-secret information to another Mac. This is especially important if you work on computers that are shared with others, or if you frequent high-traffic computing environments, such as computer labs.įortunately, the ability to encrypt files using disk images is a free feature built into every Mac running Mac OS 10.2 or later. By using encryption, you can be reasonably confident that your files will be protected from prying eyes. Make an Encrypted Disk Image to Secure FilesĮncryption satisfies one of the most basic, fundamental human needs: The right to privacy.Now, putting any files in the folder will put the file under encrypted protection too.Īfter you’re done working with the folder and want it to be password protected again, just unmount the folder from Finder.AirPort Apple Apps Backups Developer Education Email Hardware Internet iPad iPhone Mac Music Network Photos Security TV Weekend Wonk Always uncheck the box saying “Remember password in my keychain” to make sure it is always protected by passwords.Īfter a disk image is mounted, you’re able to access the folder like normal. dmg file to mount it in the Finder and punch in the password whenever you try to access the folder. To access the encrypted disk image, just double-click the. How to access encrypted disk image in macOS Once that is done, you can delete the original folder. dmg file will be created based on the folder you selected.Larger folders may take longer to encrypt. Type in any password you desire, and very importantly, make sure the checkbox for ‘Remember password in my keychain’ is NOT ticked, else it will defeat the whole purpose of encrypting your folder.Īnd that’s it! A password-protected.Choose ‘read/write’ if you want your folder to be edit-able (if not, just choose another format), and choose ‘128-bit AES encryption’.Select the folder you want to encrypt, and click Image.Then, click on File > New > Disk Image From Folder.The USB flash disks of today are a very efficient and excellent solution for file sharing, carrying around. How to Encrypt USB Flash Drive With TrueCrypt
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