How do I uninstall OS X base system in Disk Utility?

How do I uninstall OS X base system in Disk Utility?

1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R.
3. Turn on the computer.
4. Press and hold the Command-Option-P-R keys.
5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
6. Release the keys.

Can not erase OS X base system?

How to Wipe a Mac Hard Disk Drive (HDD)

1. Make sure your Mac is turned off.
2. Press the power button.
3. Immediately hold down the command and R keys.
4. Wait until the Apple logo appears.
5. Select “Disk Utility” from the OS X Utilities list.
6. Select the disk you’d like to erase by clicking on it in the sidebar.

Is it possible to unmount a disk in Mac OS X?

But, when trying to partition, Disk Utility said that it cannot unmount the disk. In Disk Utility, I found another disk called disk2 and Mac OS X Base System. As far as I know, I didn’t see that disk2 in my disk list before.

Is there a way to unmount a startup disk?

So I tried to use Disk Utility to erase the startup disk and make a new partition. But, when trying to partition, Disk Utility said that it cannot unmount the disk. In Disk Utility, I found another disk called disk2 and Mac OS X Base System.

Is the Mac OS X base system image the cause of your problem?

The Mac OS X base system image is not the cause of your problem. See What is the ‘Mac OS X Base System’ disk image on my 2011 MacBook AIr? for an explanation. My best guess, based on the screenshot, as to why you can’t repartition the Hitachi disk is that it’s the current startup device.

Why is my OS X base disk locked?

In the Disk Utility, the options for erase, restore and unmount are all unavailable (see picture 2), I imagine that’s because you normally cannot do any of these on the OS X Base System disk. This disk is also locked, so I cannot re-install High Sierra (see picture 3).