Navigate to Applications > Utilities and choose Disk Utility.
Select the drive you want to format from the left-hand navigation menu. Click Erase in the bottom right-hand corner.
Select a file system to format the drive with. If you're not sure, Mac OS Extended (Journaled) is a safe bet. Choose a new name for the formatted drive and click Erase.
|Mac OS Extended (Journaled)||JHFS+|
|Mac OS Extended||HFS+|
Navigate to Applications > Utilities and choose Terminal.
diskutil list and press enter. This will provide a list of hard drives attached to the machine. Locate and note the name of the drive you want to format.
You can use the
diskutil eraseDisk command to format a harddrive. Run the following command, be sure to make adjustments for your drive. Replace
JHFS+ with any file system you need (check the chart above for a list of file systems you can use). Replace
CleanDrive with the new name for your formatted drive. Put your disk name in place of
diskutil eraseDisk JHFS+ CleanDrive /dev/disk1
Congratulations! Your hard drive has been formatted.
With college semesters approaching right around the corner, it's more important than ever to be proactive in making sure you select the right product for you.