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Imac disk erase failed could not unmount disk
Imac disk erase failed could not unmount disk










  1. IMAC DISK ERASE FAILED COULD NOT UNMOUNT DISK HOW TO
  2. IMAC DISK ERASE FAILED COULD NOT UNMOUNT DISK MAC OS X
  3. IMAC DISK ERASE FAILED COULD NOT UNMOUNT DISK INSTALL

In the menu you’ll find access to Disk Utility to prep your drive and then re-install your OS. Once you’ve created your boot drive you’ll need to reboot under it. And off you have the older models it will have limited RAM so that also comes to play. Mojave requires Metal2 graphics services which your system does not have. High Sierra intro’ed APFS which only works on SSD’s but using it within a SATA based system is not that great. I do recommend you stick with Sierra Vs any of the newer MacOS’s.

IMAC DISK ERASE FAILED COULD NOT UNMOUNT DISK HOW TO

Here’s how to do this: How to create a bootable macOS Sierra installer drive Okay, no problem, Ill use migration assistant, since I wanted to make the things clean I started in recovery boot and > Disk Utility > Erase. So you’ll need to make an external bootable drive and besides that you’ll want to put on it the OS installer so you can appear a fresh copy from it. Think of it this way your shoes heel broke off and your stop by a shoe cobbler how is he going to fix your shoe? You need to take it off right! Thats the same here if you want to reformat the drive you need to boot up under a different drive to release the drive from the OS.

IMAC DISK ERASE FAILED COULD NOT UNMOUNT DISK INSTALL

When erasing it says “Erase process has failed” with details saying “Couldn’t unmount disk - Operation failed”.Įither make the encryption in FileVault to continue the progress which didn’t work after reading about it and trying things… or to erase the HD and start a new install from my Time Machine backup. I tried to repair or erase “Apple HDD HTS547575A9E384 Media” but it does not work. on Disk Images I see “Apple disk Image Media” which is 2.01 GB and has under it “OS X Base System”(1.29 GB) with option to eject which does not work. In Disk Utilty I see under Internal “Apple HDD HTS547575A9E384 Media” under which is greyed out my “Macintosh HD”. View 1 Replies View Related OS X Mountain Lion :: Cannot Unmount Or Erase Partitioned External Hard Drive Jun 21. Sometimes a Disk Utility Error Message flags up when formatting or partitioning in Mac ( Mac Book Pro, iMac, Mac mini, Mac Pro, MacBook Air) which is asympto.

IMAC DISK ERASE FAILED COULD NOT UNMOUNT DISK MAC OS X

Installing Imac back to factory settings, erase disk shows couldt unmount disk how to solve Info: MacBook Pro, Mac OS X (10.7.4), I bought a usb stick with the OS Xa. Stack Exchange Network Stack Exchange network consists of 180 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build. Now I can not even reformat the HD using Disk Utility from CMD+R mode. Intel Mac :: Erase Disk Shows Couldnt Unmount Disk Jun 18, 2012. I want to erase a disk (Mac system) to resize OS X Mountain Lion to the max volume but I couldnt resize it nor unmount the other disk. I decided to reformat my HD to make a clean install(I have backed up the system with Time machine) after Disk Utility have failed to repair the disk. I think the problem might be something with repartitioning the HD but I see others have problem with encryption as well. After that I went to encrypt my HD using FileVault and it got stuck for days at around 60%. I am running Macbook Pro (Late 2011) on Sierra osX.įirst I repartitioned my HD into single partition(I had Bootcamp).












Imac disk erase failed could not unmount disk