MACBOOK COULDN T UNMOUNT DISK FOR MAC

MACBOOK COULDN T UNMOUNT DISK FOR MAC

Here is a list of disk or usb formatting tools for mac or ways of formatting disk/usb. If none of this works, post back and I'll give you something more advanced to try. If you dont know the name of the drive that you need to format. 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. Enter the following where ‘x’ is your disk identifier. FOR AN ENTIRE PHYSICAL DISK: 1) Using the Terminal application again, booting from OS X Recovery or an external bootable drive. (For example to Erase/Partition the disk). gave this: Forced unmount of disk1 failed: at least one volume could not be. 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. 3) Attempt again to perform whichever task caused your ‘Couldn’t Unmount Disk’ error. 11' iPad Pro 3rdGen (Cellular), iPhone 13 ProMax, Watch S7 (Cellular), Mini (Late 2014), AirPods Pro. 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.

Go to recovery or the install image and jump into terminal. Tonight i was running off the external drive and opened Disk Utility to do volume verifications on the 3 MacBook internal partitions.

I have an external FW drive i use as a startup disk to do maintenance on my MacBook internal drive. Your drive is more than likely fine if SMART is verified, no need to replace. Disk Utility Error: Couldn’t unmount disk I have my MacBook Pro hard drive partitioned into 3 segments.

Macbook couldn t unmount disk