Mds 73 root 20r DIR 1,6 340 2 /Volumes/Install macOS High Sierra mds 73 root 23r DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root twd DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 20r DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 22r DIR 1,6 4998 26 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 34u REG 1,6 28 33 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 36r REG 1,6 118784 58 /Volumes/Install macOS High Sierra/.Spotlight- mds_store 223 root 40u REG 1,6 118784 59 /Volumes/Install macOS High Sierra/. Lsof | grep /Volumes/'Install macOS High Sierra' Unmount of disk1 failed: at least one volume could not be unmounted Sudo dd if=/dev/zero of=/dev/disk1 bs=10000000ĭisk1 was already unmounted or it has a partitioning scheme so use "diskutil unmountDisk" instead
#VOLUME ERASE FAILED WITH ERROR COULD NOT UNMOUNT DISK HOW TO#
I found a couple of articles that show you how to erase & reinstall everything without using physical discs. Started erase on disk1 Unmounting disk Error: -69888: Couldn't unmount disk 1 I have lost my original Mountain Lion install discs. Sudo diskutil eraseDisk JHFS+ Lexar disk1 Using the Terminal app with the following commands: Using Disk Utility app, but it does not see the USB or just keeps spinning. You should be able to continue the Check File System via the GUI. Afterwards use the list command to check if all the effect volumes are off the list. Would you have any suggestions or ideas? Also, I don't understand what PID 0 is doing to prevent me from erasing the USB. To force the unmount you have to use the lazy unmount option ‘-l’. Now that I’m done with it, I cannot erase it. I created a bootable USB with High Sierra on it.