WARNING: DO NOT ATTEMPT TO PARTITION THE DRIVE CALLED “Macintosh HD”
1. Back up all information that you wish to keep. Partitioning will erase your drive.
2. Go to: Mac HD> Applications> Utilities> Disk Utility
3. click on the volume that you would like to partition (The partition name will start with numbers and not letters)
4. Click the “Partition” tab.
5. Click the “+” at the bottom to create as many partitions as you would like and then adjust the size.
6. Click “Apply”