By entering the root password, provided during installation of macOS/OS X, you will now be in the root command prompt.Ħ. We now need to enter Single User Mode by typing: ” sudo -s ” (note that this has to be typed using a lowercase ‘S’). In our specific example, as we have already mentioned above, we had an iMac with macOS High Sierra installed therefore we can see that our primary disk is called Macintosh HD and that its main partition is called “System”.ĥ. This will reveal all the different disks available on your computer, including their names and designations. Once in Recovery Mode, open Terminal and type the following command: “diskutil list”Ĥ. While this happens presss and hold Command+R as it boots allows you to boot from Recovery Mode.ģ. Select “Restart” from this dropdown menu, then click directly on “Restart.”Ģ. Click the Apple Menu icon located at the top left corner of your macOS screen. This can be fixed by following the instructions available in this article. In our specific case, if you are unable to access Disk Utility on macOS High Sierra, it is most likely due to the fact that your Startup Disk has not been set correctly.

In any case, make sure that you have booted your Mac from its actual operating system before proceeding with any other actions below. The Disk Utility app can either be used from Recovery Mode or Single User Mode, depending on whether your computer has been set up correctly or not during initial installation. This application does not exist in all versions of macOS, even though it seems to be present by default on most of them. The macOS Disk Utility is a tool that allows you to manage disks and volumes in a graphical manner. The following article focuses on providing several solutions for this problem to resolve the situation. Is disk utility is not loading on Apple macOS? Don’t worry you are not alone!

Os x utilities no startup disk