Unmounting external drives on a Mac is usually done quick and simple by either dragging drive icon to the trash, or by using the eject symbol in a Finder window. Mounting usually happens automatically when a new drive is inserted into a USB port or SD card slot.
Jul 05, 2017 Modern versions of Mac OS X no longer need you to repair disk permissions. However, that’s not the only issue that can occur with a disk or file system. Skype for windows 10 64 bit. Mac OS X contains a variety of tools for repairing disk, partition, and file system errors. These options work like chkdsk on Windows, checking for disk and file system errors and repairing. But, when trying to partition, Disk Utility said that it cannot unmount the disk. In Disk Utility, I found another disk called disk2 and Mac OS X Base System. As far as I know, I didn't see that disk2 in my disk list before. I tried to unmount it or erase that disk2, but it won't let me. When an external hard drive is not working properly, you can use the built-in disk repair tool - First Aid to check and repair disk errors. Step 1: Launch Disk Utility. Step 2: Choose the unmountable external drive on the left sidebar. Step 3: Select First Aid in the top center and click Run. Solution 2: Repair the external hard drive with Terminal. Oct 13, 2016 Mac OS X Support Mac Software Other Apple Hardware Laptops Laptop Compatibility Catalina Laptop Support Catalina Laptop Guides Mojave Laptop Support. Tried it and still the same unable to unmount volume for repair. RehabMan Moderator. Joined May 3, 2012 Messages 189,207 Motherboard Intel DH67BL CPU i7-2600K Graphics HD 3000 Mac Mobile Phone. Jun 14, 2013 Such boot drives are easy to create on your own, here are instructions for making boot disks for OS X 10.9, OS X 10.8, and OS X 10.7. For older Macs running prior versions of Mac OS X, typically anything running OS X 10.6 or earlier will have a SuperDrive, and thus shipped with a bootable DVD that can serve this same purpose.
However, there is a way to do this via the command line, of which I am a big fan. Fire up a Terminal session and see how to do it.
Listing available drives
![Mac os x unable to unmount volume for repair 69673 Mac os x unable to unmount volume for repair 69673](https://ugetfix.com/wp-content/uploads/articles/askit/how-to-fix-couldnt-unmount-disk-error-on-mac-disk-utility_en.jpg)
To see what’s currently attached to your Mac, let’s use the diskutil command, followed by the word list. You’ll see output like this:
Attached drives are listed with their physical locations on the left (i.e. /dev/disk0, /dev/disk1, etc), as well as with their respective partitions if available on the right (like disk0s1, disk1s2, etc). Make a mental note of the latter: you’ll see that we have a physical disk (like disk0), on which several partitions may have been created. It is those partitions we’ll mount and unmount, NOT the physical drive.
Unmounting an attached hard drive
On my system I have two internal hard disks (disk0 and disk1), and one external USB drive (disk2). Let’s unmount that USB drive now:
Note how we use the unmount command. We need to specify the location of the partition with its full path (i.e. /dev/disk2s1).
Mac Os X Unable To Unmount Volume For Repair Parts
Mounting an attached hard drive
Mac Os X Disk Utility Unable To Unmount Volume For Repair
Best ls1 tuning software. To mount the drive again, without having to take it out and plugging it in again, I can issue this command: