Disk Utility is the perfect choice for creating a partition of your Mac’s hard drive. It is a built-in app on all Macs and straightforward to use. When you make a partition, you will be presented with easy to understand pie chart of your hard disk space. To access the Disk Utility on a modern Mac—regardless of whether it even has an operating system installed—reboot or boot up the Mac and hold Command+R as it boots. It’ll boot into Recovery Mode, and you can click Disk Utility to open it up. In Recovery Mode, macOS runs a special sort of recovery environment. Disk Utility is an app that comes with your Mac. It’s tucked away in the Utilities folder, which is found inside the Applications folder, but is easy to locate using Spotlight - which you.
Disk Utility can find and repair errors related to the formatting and directory structure of a Mac disk. Errors can lead to unexpected behavior when using your Mac, and significant errors might even prevent your Mac from starting up completely.
You can use Disk Utility on your Mac to manage internal disks and external storage devices. Using Disk Utility, you can: Format and manage volumes on physical storage devices. Create a disk image, a single file you can use to move files from one computer to another or to back up and archive your work. Combine multiple hard disks into a RAID set that acts as a single disk. Using multiple hard disks in a.
Click on the Apple menu (top left corner), choose Restart. When your Mac restarts, press Command + R and hold the keys until the Apple logo appears. Select Disk Utility and click Continue. In the sidebar, choose the disk you think needs repair. Note, that if you are using FileVault to encrypt your disk, you must mount the disk first.
Before proceeding, make sure that you have a current backup of your Mac, in case you need to recover damaged files or Disk Utility finds errors that it can't repair.
Open Disk Utility
Start up from macOS Recovery, then select Disk Utility from the Utilities window. Click Continue. If you're not repairing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder.
Locate your disk in Disk Utility
Best Mac Disk Aid
Choose View > Show All Devices (if available) from the menu bar or toolbar in Disk Utility.
The sidebar in Disk Utility should now show each available disk or other storage device, beginning with your startup disk. And beneath each disk you should see any containers and volumes on that disk. Don't see your disk?
In this example, the startup disk (APPLE HDD) has one container and two volumes (Macintosh HD, Macintosh HD - Data). Your disk might not have a container, and it might have a different number of volumes.
Repair volumes, then containers, then disks
For each disk that you're repairing, start by selecting the last volume on that disk, then click the First Aid button or tab.
In this example, the last volume on the disk is Macintosh HD - Data.
How to stop the downloading of a mac app. Click Run to begin checking the selected volume for errors. Mac apps like vlc.
If there is no Run button, click the Repair Disk button instead.
If the button is dimmed and you can't click it, skip this step for the item you selected, and continue to the next item.
If you're asked for a password to unlock the disk, enter your administrator password.
After Disk Utility is done checking the volume, select the next item above it in the sidebar, then run First Aid again. Keep moving up the list, running First Aid for each volume on the disk, then each container on the disk, then finally the disk itself.
In this example, the repair order is Macintosh HD - Data, then Macintosh HD, then Container disk2, then APPLE HDD.
If Disk Utility found errors that it can't repair
If Disk Utility found errors that it could not repair, use Disk Utility to erase (format) your disk.
If your disk doesn't appear in Disk Utility
If Disk Utility can't see your disk, it also can't see any containers or volumes on that disk. In that case, follow these steps: Macos app download.
Free Mac Disk Utility
Shut down your Mac, then unplug all nonessential devices from your Mac.
If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
If your disk still doesn't appear in Disk Utility, your disk or Mac might need service. If you need help, please contact Apple Support.