Imac Fusion Drive Mac Os High Sierra
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What ever I do, I keep getting this error when trying to reinstall the OS: 'an error occurred while preparing the installation. try running this application again'
I have tried the following:
Install mac os on new ssd optical drive. -Disk utlitity, cleaned the drive to Mac OS Extended (Journaled).
Imac Separate Fusion Drive
-Internet recovery - Getting the same error.
- Mac OS X 10.13 High Sierra Full OS Install - For unibody Aluminum models, Not for older plastic models. This won't load on Mac computer with EFI firmware lock - If computer shows a lock pad on screen when restart and hold 'Option' Key, that is EFI firmware lock and its motherboard must be fixed first before any OS X installation can take place.
- Dec 18, 2017 I recall that it wasn't safe to install on iMac's with fusion drive when MacOS High Sierra first came out, and heard that existing owners should wait. It's been awhile since then so is it safe to finally install update now? I want to be sure before I attempt to do so.
- Apr 21, 2018 Currently, there is no direct way to install High Sierra on a newly created Fusion Drive. Basically, the installer forgets to create the Recovery Partition on the HDD of the Fusion Drive, rendering the system unable to boot after copying the installation files to disk.
Nov 15, 2019 This is how to Fix A Split Fusion Drive on any iMac that comes pre-installed with High Sierra or MacOS Mojave.Terminal Codes for MacOS High Sierra: diskutil list diskutil cs create Macintosh. Oct 07, 2019 Mac mini introduced in mid 2010 or later iMac introduced in late 2009 or later Mac Pro introduced in mid 2010 or later. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu. If your Mac isn't compatible with macOS High Sierra, the installer will let you know. Feb 03, 2020 If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive. Here's how to fix it. Fusion Drive, a storage option on some iMac and Mac mini computers, combines a hard drive and flash storage in a single volume for improved performance and storage capacity.
-Booted the iMac - so it installs the OS that came with it (El Capitan). Same error!
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-Downloading MacOS from app store from 2 different macs, putting it into a USB (Bootable) - getting the same error.
Tried re-downlading the app 3 times!
-Going in to terminals, typing in 'date'. The date is 100% correct.
Looks like I am out of luck.. anyone who can help
What else can I do? I have tried for several hours, but it wont let me install the OS?
Update (12/20/2017)
Tried doing the PRAM reset aswell two times (Boot sound coming 3 times)
Currently I removed my Crucial RAM´s. Trying again now to see if it works.
Also, did the 'ntpdate - u time.apple. com'
Hopefully this does the trick
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Is this a good question?
Fusion Drive, a storage option on some iMac and Mac mini computers, combines a hard drive and flash storage in a single volume for improved performance and storage capacity. If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive. This can happen after replacing either drive of your Fusion Drive, or using software to intentionally split them into separate volumes.
You can continue using the two drives independently, or follow these steps to regain the benefits of having the single logical volume of a Fusion Drive.
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Before you begin
If you're not sure that your Mac was configured with a Fusion Drive, or that the drive has been split:
- Disconnect any external storage devices from your Mac.
- Choose Apple menu > About This Mac, then click Storage.
- If you see a drive labeled Fusion Drive, your Fusion Drive is working and this article doesn't apply to you.
- If you have a Fusion Drive that has been split, you should see two drives. One of them should be labeled Flash Storage, with a capacity of 24GB, 32GB, or 128GB. The other should be at least 1TB.
Use Terminal to create a Fusion Drive again
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These steps permanently delete all data stored on the drives that make up your Fusion Drive. Make sure that you have a backup before continuing.
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If you're using macOS Mojave or later
Where Is Mac Os On Fusion Drive
- Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys when you see the Apple logo or spinning globe.
- When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
- Type
diskutil resetFusion
in the Terminal window, then press Return. - Type
Yes
(with a capital Y) when prompted, then press Return. - When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
- Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.
Imac Fusion Drive
If you're using macOS High Sierra or earlier
- Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys you see the Apple logo or spinning globe.
- When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
- Type
diskutil list
in the Terminal window, then press Return. - Terminal displays a table of data about your drives. In the IDENTIFIER column, find the identifier for each of the two internal, physical drives that make up your Fusion Drive. Usually the identifiers are disk0 and disk1. One of them should be 128GB or less in size. The other at least 1TB in size.
- Type the following command, replacing identifier1 and identifier2 with the identifiers you found in the previous step. Then press Return.
Example: diskutil cs create Macintosh HD disk0 disk1
- If you get a disk unmounting error, enter
diskutil unmountDisk identifier
, using the first identifier you gathered previously. Then enter same command again using the second identifier. Then retry the command in step 5. - Type
diskutil cs list
, then press Return. - Terminal displays additional data about your drives (volumes). Find the string of numbers that appears after ”Logical Volume Group” for the volume named Macintosh HD. It's a number like 8354AFC3-BF97-4589-A407-25453FD2815A.
Example:
+-- Logical Volume Group 8354AFC3-BF97-4589-A407-25453FD2815A
Name: Macintosh HD - Type the following command, replacing logicalvolumegroup with the number you found in the previous step. Then press Return.
Example: diskutil cs createVolume 8354AFC3-BF97-4589-A407-25453FD2815A jhfs+ Macintosh HD 100%
- When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
- Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.