The Disk Utility app of Mac allows one to create a password protected folder. An encrypted disk image is created. To mount the disk one has to enter the password set at the time of creation. The steps to create one is very easy.
Open up the Disk Utility app. Goto File -> New -> Blank Disk Image. Enter a name for the image. Choose the location. Disk name will be the name of the mounted image. Set a size that you want. Importantly enable encryption from the drop down. And for the image format drop down, select the Sparse Disk Image option. Click on create.
A new window comes up to set a password. Remember to uncheck the “Remember password in Keychain” option. Set the password and you are done.
Double clicking on the image file will bring up a window to enter the password. Authenticate yourself and you’ll see that the image has been mounted. Add files, remove files, etc and do whatever you want to. Remember to eject the image after your work is done.
There you go. A password protected image is all setup.
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