Next, type in the password to verify this action and when you are done, the Disk Utility creates an encrypted disk image. If you want to open a protected file, find it on your Mac and enter the password, after you’re done, unmount the disk image so that. Jan 11, 2012 Password Protect Folders & Files in Mac OS X with Encrypted Disk Images. And drag files and folders into the mounted image that you want password protected. The default location for new disk images is the Desktop, but if you saved it elsewhere, look there instead. I’d love to use dmg or encrypted dmgs but how do I open (mount) them in.
Once you double click the DMG file it will open as a read only drive and appear under devices, if you then click on the read only drive it has opened as there will either be a .pkg file you can double click which loads an installer menu.
If however it is just a single icon or program on it's own, then you need to drag (or copy and paste) it into the applications folder on the computer.
Once it has finished copying, you can then eject the mounted read only drive image.