As a first line step be sure to close all open files and programs. Select Mount in the top center of Disk Utility. Couldnt unmount disk errors usually appear in Disk Utility when the boot drive is busy. Choose the grayed external drive in the Disk Utility's sidebar. Click on the 'Show All Devices' in the Disk Utility's View menu to show external hard drive icon.
UNABLE TO UNMOUNT DISK MAC MAC
If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon. Find Disk Utility by clicking Go at the upper left of your desktop and go to Utilities, then open Disk Utility on your Mac computer. 1 Run diskutil eject disk2s2 Repeat that and sudo fuser -c /dev/disk2s2 to kill or quit any processes that are blocking the eject. In the Disk Utility app on your Mac, select an existing APFS volume in the sidebar, then click the Add Volume button in the toolbar.
Each volume you add to an APFS container can have a different APFS format, if needed.These tasks include formatting, partitioning, erasing, cloning disks, repairing a damaged disk, etc. With the volume unmounted it should allow the process to complete. Disk Utility, developed by Apple, is a comprehensive system utility for performing disk and disk volume-related tasks on the Mac operating systems. If that does not work then highlight the volume and click unmount.There is also the risk of the data getting lost. If, instead, I select the physical device instead of. Restoring the original state found as mounted. I show in this video the solution to the disk disassembly problem in macOS. I hope this helps someone else, as I struggled with this for a few hours.
Once you have done this, you can format the entire Volume. You do this by selecting the partition in the left pane, and OPTION+CLICKING the 'Unmount' button. It is a critical situation because your data stores on the hard disk, and it is now not accessible. If I have selected the Volume and run First Aid then I get the following: Running First Aid on LaCieDrive (disk4s2) Repairing file system. THE EASIEST WAY TO UNMOUNT: Simply use Disk Utility to 'Force Unmount'. Macinto9e3bfb3c:~ howardhonig$ diskutil listĢ: Apple_HFS Macintosh HD 999.3 GB disk0s2ģ: Apple_Boot Recovery HD 650.There are times when the drive doesn’t mount, preventing your system from starting. Terminal > sudo diskutil unmountDisk /dev/disks1 FAQ How Do I Force Unmount Macintosh HD The system can’t unmount the disk on Mac that you are currently booted from. Press Return and enter the admin password. Thanks.Įxample of what I've tried in Terminal. In Terminal type sudo diskutil unmountDisk /dev/disks1 (make sure to change ‘disks1’ with the name of the drive). I've tried to unmount the entire disk as well as the individual partitions. I've tried to unmount through disk utility as well as through Terminal. Disk Utility states the disk needs to be repaired, but when I try to repair the disk, "unable to unmount for repair" is stated. I can see the drive in Finder, but some times the folders appear to be empty of files, and sometimes I can see the files but cannot access. I cannot transfer files to/from this hard drive anymore, and Time Machine will no longer work. I have a 2010 iMac with a 1.5 TB Seagate external hard drive I use for Time Machine as well as other backups. I'm having a problem unmounting an external hard drive. Enjoy OS X Mavericks By the way, if there is a more direct method to create a bootable installation drive, we. Select the orange drive, labeled OS X Base System 1 from the boot menu. With the USB drive attached, reboot the Mac and hold down the Option key.
UNABLE TO UNMOUNT DISK MAC INSTALL
I've tried to unmount the entire disk as well as the individual partitions. Booting from OS X Mavericks Install Drive. I know this conversation seems to be close, but thought I'd try to post here. Disk Utility states the disk needs to be repaired, but when I try to repair the disk, 'unable to unmount for repair' is stated.
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