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What the issue is, you are trying to modify the drive you are currently working on which it doesn't like. You can now quit Terminal and eject the volume.I'm writing this as I search for it and found solutions and none of them worked and I noticed I wasn't the only one.Įasy solution is hold down command + R and get into disk utility, select the main HD and select File > "Enable journaling" but if you are like me, it was greyed out. When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Monterey.After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume.Terminal shows the progress as the volume is erased. When prompted, type Y to confirm that you want to erase the volume, then press Return.Terminal doesn't show any characters as you type. When prompted, type your administrator password.If the volume has a different name, replace MyVolume in the command with the name of your volume.

Each command assumes that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using.

Open Terminal, which is in the Utilities folder of your Applications folder.Plug in the USB flash drive or other volume that you're using for the bootable installer.
