2/15/2023 0 Comments Could not unmount disk osx![]() ![]() Now I´m unable to use the external disk, it appers on the desktop but I cannot eject it (because the computer says the disk is being used) I cannot repair it or erase it using disk utility because an error appears: unable to unmount. I tried to use my WD 320gb disk with time machine, while the information was being recorded my lapton run out of power and shut down. Boot the Mac OS X CD (well, it happens by default now) 5. Run these commands: dd if=/dev/zero of=/dev/rdisk0 bs=1k count=1k pdisk /dev/rdisk0 -initialize reboot 4. Go into single-user mode (hold Option-S) 3. How to clear your entire primary drive and get it ready for repartitioning: 1. ![]() Disk Utility can’t detect or repair all problems that a disk may have. Disk Utility can fix certain disk problems-for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn’t work properly, or your computer won’t start up. Repair a storage device in Disk Utility on Mac. For whatever reason, you need to set your Mac back to its factory defaults. Maybe you want to reset for better overall performance, are thinking of giving away or selling your MacBook after you purchase or receive the latest Mac model. Perhaps your Mac is showing just a too much little lag. ![]() Fortunately, there’s an easy solution! We’ll show you two ways to force your Mac to let go! The easiest and safest way to force a volume to eject is to open a new Finder window, locate the drive or volume in the left-hand column, right-click or option-click the volume, and select Eject “Volume Name” in the drop down menu. However, since you are erasing the drive anyway, this doesn’t really matter in your situation. Using the above command can interrupt file read/writes, which can cause file corruption. Following this, attempt to Erase/Partition the drive again in Disk Utility. Replace VOLUMENAME with the name of a volume on the disk you are trying to unmount. ![]()
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