How to Add, Delete, and Resize Your Mac Drive Without Erasing It First
Instructions apply to Mac OS X Leopard (10.5.8) and later. Do not attempt to use earlier versions of Disk Utility for the process provided here. Open Disk Utility, which is located in/Applications/Utilities/. Internal drives and volumes appear in the Disk Utility sidebar. Physical drives are listed with a generic disk icon. Volumes are listed below their associated physical drive. In the sidebar, opt for volume you want to resize, then selectPartition....