If you need to format, partition, or otherwise work with hard drives on a Mac, Apple’s Disk Utility is the tool you use. Found in the Utilities folder, inside your Applications folder, Disk Utility is a powerful tool that offers a full range of features to manage disks and volumes, encrypt and decrypt them, work with disk images, and much more.
The following is an overview of how to manage disks and volumes with OS X’s Disk Utility. In this article, you will learn how to get information about your drives, format a new disk, partition a drive, and turn on encryption.
Read the rest of the article on The Mac Security Blog.