When you partition a hard drive, you physically create separate sections on the drive ; each of these sections is called a partition.
Disk image files on the Mac OS X are DMG files. They are like virtual images of disks that come with software that is downloaded from the Internet. They contain. If you have previously partitioned your Mac's hard drive in order to download a macOS beta or install Windows, but now you need that storage space back, you can remove the partition After erasing a partition, you can then remove it from your system. Disk Utility will check the disk and make changes.
A partition defines a specific area of a hard drive. Data can be erased in multiple ways. The default method on the Mac deletes the data table entries for the location of the file but does not actually remove the file itself from the hard drive or volume. The practical effect of this is that your Mac no longer sees the file, and the space it uses is now marked as available free space.
You can also specify optional erase options that will completely remove the data. Your Mac can use five different types of formats: Current drives and volumes will display in a list pane on the left side of the Disk Utility window.
Not applicable no file system Mounted: Spring comes with its own rituals. It stores all desktop files and folders in a hidden Shadow Desktop, which you can access from the menu bar or in the Finder. Reclaim disk space iBook G4 Leopard You will also select the type of drive format to use.
Volumes are listed below their associated physical drive. Select the drive associated with the volume you wish to expand. Select the volume listed immediately below the volume you wish to expand. Disk Utility will display a confirmation sheet listing the volume you are about to remove. Make sure that this is the correct volume before taking the next step.
Select the volume you wish to expand. Grab the right-hand bottom corner of the volume and drag to expand it.
Disk Utility will display a confirmation sheet listing the volume you are about to resize. Disk Utility will resize the selected partition without losing any of the data on the volume.
Volumes are listed below their associated hard drive. Select the existing volume that you wish to split into two volumes.
Disk Utility will dynamically display the resulting Volume Scheme, and show how the volumes will be configured once you apply the changes. Disk Utility will display a confirmation sheet that lists how the volumes will be changed. Volumes are listed below their associated drive.
Each disk and volume is identified by the same name and icon that it displays on the Mac desktop. Click the Erase tab. Select a volume from the disks and volumes listed on the left side of the Disk Utility window.
It removes the volume's catalog directory but leaves the actual data intact. Zero Out Data. This method provides a good level of security. It erases the volume's data by writing over it with zeros. The length of time this method takes depends on the size of the volume. This method meets the security requirements of the U. Department of Defense's M standards for erasing magnetic media.
This is the highest level of data erase security that Disk Utility supports. It writes over the data on a volume 35 times. Don't expect this erase method to finish any time soon. The slider options are: This is the quickest erase method. It doesn't scramble the file data, which means a recovery app may be able to resurrect the erased data.
Zero Out the Data. This erase method writes a single path of zeros to all locations on the selected volume or disk. Advanced recovery techniques could restore the data, but it would require a great deal of time and effort. This is a DOE compliant three-pass secure erase.
It writes two passes of random data to the volume or disk and then writes a single pass of a known data pattern to the volume or disk. Most Secure. This method of securely erasing a volume or disk meets the requirements of the U. The erased volume is written to seven times to ensure the data can't be restored.
Make your selection and click the OK button to close the Security Options. This formatting process takes a little longer than the basic erase method described previously. Select a drive from the list of drives and volumes shown in Disk Utility. Click Erase and then click Done. With the data erased from your partition, you still need to delete the now-empty partition in order to reallocate its space to the rest of your hard drive.
To do so, select your hard drive from the left panel and then click the Partition button at the top of Disk Utility. On the pie graph on the left, click the wedge that represents the partition you just erased. Click the " - " button and then click Apply. After a minute or so, Disk Utility will finish applying changes to your drive and deem the operation successful.
Click Done to complete your work here.