Verify disk could not unmount disk12/18/2023 ![]() You should see something like this: NAME FSTYPE LABEL UUID FSAVAIL FSUSE MOUNTPOINT sda sda1 ext4 PASSPORT2TB 86645948-d127-4991-888c-a466b7722f05 1.5T 11 /mnt/Passport2TB sdc sdc1 vfat boot 592B. If none of this works, post back and I'll give you something more advanced to try. Step 3: From a terminal window on the Linux PC/RPi, use lsblk to get the necessary file system 'handles' for the SD card: lsblk -fs. If that executes and does not give a cannot unmount error quit terminal and try the install again.Īgain using disk0 or whatever you found above. Type: diskutil erasedisk jhfs+ "Macintosh HD" disk0 If there were no core storage volumes found in the first place.įrom here identify your internal disk identifier. Type: diskutil cs delete 123ADGF-3953-DSCB43G-0682BIAGĮxecute this, then quit terminal and try to use disk utility again to erase and format like you were trying before. You should see something like 'Logical Volume Group: 123ADGF-3953-DSCB43G-0682BIAG.' Copy that string of random numbers and letters to the clipboard, then. If it displays a bunch of stuff and doesn't say something along the lines of 'no core storage volumes found,' then you have to break up the Core Storage logical volume group first. Mac Contents What is the Couldn’t Unmount Disk Error on Mac What Causes the Couldn’t Unmount Disk Error in Disk Utility for Mac How to Fix the Couldn’t Unmount Disk Error on Mac Summary Quick Fix Download and try Outbyte MacAries right now to see what it can do for your Mac. ![]() Go to recovery or the install image and jump into terminal. ![]() Your drive is more than likely fine if SMART is verified, no need to replace. ![]()
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