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It's a free built-in tool in macOS, which can check and repair directory damages. If your hard drive is experiencing problems and you would like to make a diagnosis, Disk Utility First Aid is at your disposal.

What does First Aid do in Disk Utility? Check hard drives

We will explain how to use every tool in the following paragraphs. They allow you to add or delete volumes, check and repair hard drives, partition, erase, restore and unmount a disk or a volume. Six tools you can perform on the shown disks or volumes are listed horizontally. Take a look at the top-right of the menu. Beneath it is the APFS container if you are running macOS 10.13 or later and two volumes - Macintosh HD for system files and Macintosh HD - Data for user data.

The picture below shows a Disk Utility interface on macOS 11 Big Sur.Ĭlick View > Show All Devices, then all the detected internal or external drives and disk images will appear on the left sidebar, beginning with the startup disk. The position of icons may look slightly different on your Mac running a different operating system. What does Mac Disk Utility do?īefore diving into its essential functions, let's go through the items listed on its interface. If you Mac fails to boot up, or the options on the toolbar are dimmed, you need to first boot into Mac Recovery Mode to access Disk Utility from the macOS Utilities window. It looks like a disk going through a stethoscope. If your Mac functions well, you can find it in the "Other" folder of your Launchpad. There were two utilities in the classic Mac OS: Disk Utility and Disk Copy, and it was not until Mac OS X Panther that they merged to the nowadays Disk Utility.