Oct 06, 2017 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. How to create a bootable macOS High Sierra installer drive Put the macOS High Sierra installer on an external USB thumb drive or hard drive and use it to install the operating system on a Mac. So imagine being able to make an Fusion drive with a fast and a slow SSD. Making a Fusion Drive. Here’s how I made a fusion Drive: Firstly I had to boot from the internet recovery partition. (Reboot and hold down Apple-R). I plugged in my Samsung T5 drive and combined with the internal SSD drive of the Mac Mini to form a new Fusion Drive.

Fusion Drive Mac Os High Sierra 10 13 6 Free Download
High Sierra Os
Mac Os High Sierra Update

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.

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

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.

If you're using macOS Mojave or later

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.

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.

Check compatibility

You can upgrade to macOS High Sierra from OS X Mountain Lion or later on any of the following Mac models. Your Mac also needs at least 2GB of memory and 14.3GB of available storage space.

MacBook introduced in late 2009 or later
MacBook Air introduced in late 2010 or later
MacBook Pro introduced in mid 2010 or later
Mac mini introduced in mid 2010 or later
iMac introduced in late 2009 or later
Mac Pro introduced in mid 2010 or later

Fusion Drive Mac Os High Sierra 10 13 6 Free Download

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.

Make a backup

Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.

Get connected

It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.

Download macOS High Sierra

For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system.

High Sierra Os

If you still need macOS High Sierra, use this App Store link: Get macOS High Sierra.

Begin installation

After downloading, the installer opens automatically.

Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.

If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.

Allow installation to complete

Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.

Learn more

Mac Os High Sierra Update

If you have hardware or software that isn't compatible with High Sierra, you might be able to install an earlier macOS, such as Sierra or El Capitan.
macOS High Sierra won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
You can use macOS Recovery to reinstall macOS.