Mac OS X 10.5 Help
Removing Windows from Your Computer
You can use Boot Camp Assistant to remove Windows from your computer and restore your hard disk to a single partition.
Warning: Make a backup of the important information on your computer before removing Windows. Windows software and all other information on the Windows partition will be erased.
To remove Windows from your computer:
In Mac OS X, quit all open applications and log out any other users on your computer.
Open Boot Camp Assistant, in the Utilities folder in the Applications folder.
Select “Restore the startup disk to a single volume,” and then click Continue.
If your computer has multiple internal disks and you used Boot Camp to create a Windows partition on one of them, follow steps 1 and 2 above, and then click “Create or remove a Windows partition.” Click Continue and select the disk with Windows on it. Then select “Restore to a single Mac OS partition.”
If you installed Windows on a single-volume disk, use Disk Utility (located in the Utilities folder in the Applications folder) to erase the disk and reformat it as a Mac OS X volume.