This cool solution describes the procedure to partition hard disk in a Mac Mini system that already has an OS installed. The procedure to partition the disk varies depending on whether you are a root user or a non-root user.
When you are a root user, the Disk Utility in the utilities list of applications is fully operational and all options are available for you. If you are a root user, select Applications > Utilities > Disk Utility, then use the partition option.
Applications > Utilities > Disk Utility
Continue with 5.Partitioning the Hard Disk By Using the Disk Utility
If you are a non-root user ( or for some reason could not enabled root login), you might not be able to use the partition facility. The options in the partition tab will be disabled.
Utility options disabled!!
The following steps describe the procedure to partition Mac Mini when you are a no- root user:
Mac OS install DVD
Install CD/DVD detected
Disk Utility from Utilities drop-down
In the Disk Utility window, the left pane lists all the existing partitions. Partition can be done on an already existing partition(if there is one) or on the complete hard disk volume. Follow the procedure given below to partition the hard disk.:
Choose partition count
Number of partitions
Note: Check the free space before you decide the size of partitions. Older versions of MAC OS (versions before Snow Leopard) occupy approximately 12GB to 15GB just for the OS. Snow Leopard takes only half of that!!
Quit Installer Wizard
Prompt to restart