![]() 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. ![]() Here’s how to do this: How to create a bootable macOS Sierra installer drive ![]() 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. 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”. Now I can not even reformat the HD using Disk Utility from CMD+R mode. 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%. To unmount a disk image in Windows, open "My Computer," select the disk image, and click "Eject this disk." In Mac OS X, select the disk image on the desktop and drag the disk image to the trash, which will change to an Eject icon.I am running Macbook Pro (Late 2011) on Sierra osX.įirst I repartitioned my HD into single partition(I had Bootcamp). Disk images can also be unmounted, which may free up some RAM used by the system to mount the image. External storage devices should typically be unmounted before being disconnected to avoid corrupting files. It takes a mounted disk and makes it inaccessible by the computer. Unmounting a disk is, not surprisingly, the opposite of mounting a disk. However, unlike a physical disk, most disk images are read-only, meaning new data cannot be written to the disk. Once the disk image has been mounted, its contents will appear as a physical disk in the computer. Disk images may be mounted by either the operating system or a disk utility program, such as Nero for Windows or Apple Disk Utility for the Mac. While disk images are not physical disks, they must also be mounted in order for the computer to recognize them. Most disks are automatically mounted by the operating system when they are connected. ![]() This is a software process that enables the operating system to read and write data to the disk. Answer: Mounting a hard disk makes it accessible by the computer. ![]()
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