Encrypt folders in macOS - 100% working in Sierra

If you are a mac owner this is a feature that you must know. There can be a ton of information that belong to different sensitivity levels on your computer. Sometimes you might not want others to see highly sensitive data on your computer. I came across with this feature a couple of days ago and I thought there can be so many people out there who really have dirty secrets to hide just like me 😉.
If you are still using macOS X , do not worry this will work smooth on your computer as well.

1) Go to "Disk Utility"

You can press command + space to get the spotlight search bar and type Disk utility

Or you can just go to Launchpad and click on others. Then you will see Disk utility in there.

2) Once you get the interface of Disk Utility you will see Disk utility task bar on the top of your screen. Click on File and then go to New Image. From there select Image from Folder.

3) Now create a text file somewhere. I created a text file and named it as "test"

4) Now again go to disk utility. You are prompted to browse the folder you wish to encrypt. I put my text file into a folder called "test". Select that folder. (Click on open)

5) Now you are asked to put values and select the encryption mechanism (AES- Advance Encryption Standard).
You have two options (128bit AES encryption and 256bit AES encryption). Now this totally up to you. If you think the data that you are going to encrypt requires high level of security, then select 256 bit AES algorithm. The problem with this algorithm is it is slower than 128bit AES algorithm.)
You will be asked to provide a password to access the encrypted folder.

You have to be very careful when selecting the "Image format" property. If you are planning to do changes to documents inside your encrypted folder later then select read/write option.

Once you click on "save" your folder will be encrypted.

Once it is done go to your saved location and double click on the encrypted folder. If you look carefully you will notice that it is not a folder anymore but a disk image.

Double click on the disk image.
You will be asked to provide the password.

You can see there is a check box saying Remember password in my keychain. Do not tick it. Otherwise this encryption is useless.
Go to desktop. You will see something like this now.

Double click on this. Now you will see your file.

After your work inside the encrypted folder open up a finder window and go to device section. From there you can see your disk image is mounted. Click on the upwards arrow mark to eject it so when someone tries to access the encrypted disk image he/she will be prompted to enter the password again.

That's it guys. Hope this post helped you. Cheers.