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Pearing 2.0 | OS X High Sierra


Pearing your MacBook is a simple, but permanent process. To prevent the potential for data loss, please make sure to follow the steps below carefully. Pearing makes edits to your operating system's core storage which results in a Macintosh HD that is additively larger. This process requires a basic level understanding of how your computer operates. If you run into problems, please, contact our support team.

Create a Time Machine Backup

A Time Machine backup is a necessary safeguard to the Pearing process. Make sure that your Time Machine backup is enabled and up-to-date. DO NOT skip this step

All MacBooks have the ability to "Time Machine Backup". For information on how to enable your MacBook's existing backup, click the video or follow a tutorial below:

Apple's official tutorial here
A complete video overview here

In addition to a Time Machine backup, a cloud backup is also recommended.

Turn OFF Your Computer

Shut Down your computer. You can press the power button or go to the Apple menu bar and click Shut Down.

Pleaso also unplug any external drives connected to your computer.

Leave the TarDisk connected!

On the next steps your computer will be turned off, we suggest you open this page on a phone or tablet.

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Boot into Recovery Mode

With the TarDisk plugged-in, restart your computer into Recovery Mode:

(1) First, make sure your computer is turned off.

(2) Once it's off, press the power button once to turn your MacBook on.

(3) Immediately press and hold the Command (⌘) + R keys when you hear the startup sound to start your Mac from OS X Recovery. Keep these two keys held down until you see an Apple logo or globe appear.

Command + R

* If you don't see the Recovery Mode screen or you went back to the normal login screen, repeat the process again from step (1).

Open Terminal

Once on the OS X Utilities screen, open Terminal. From the Menu Bar, click on Utilities and choose Terminal.

how to select Terminal from os x utilities window

Run diskutil

Type the command below in Terminal and press enter/return to get a list of your internal drives and the TarDisk identification.

diskutil list internal

You should get results similar to these. To facilitate the process, you can maximaze the Terminal window by clicking on the green button in the upper-left corner. And to increase the font size, press the Command (⌘) key and +.

Diskutil Internal List

We are looking for two different volumes Apple_APFS Container and TarDisk.

Your disks may have different identifiers assigned to them, so please pay attention! In our case disk0s2 corresponds to the Apple_APFS Container, and disk4 to the TarDisk volume.

Finding your Apple_APFS Container volume should be easy as there should be only one. Meanwhile, TarDisk should have EFI and Apple_HFS volumes as you can see in the picture above..

Erase the APPLE_APFS Container volume and TARDISK

(1) Once you have figured out which sections correspond to the Apple_APFS Container and TarDisk, you must erase both of them. So please run the following command:

diskutil eraseVolume JHFS+ SSD disk0s2

You should get the following message: Finished erase on disk0s2 SSD

* If you get a message stating: "The target disk is in use by APFS as a Physical Store", click here.

Please run the two commands below, using your internal drive identifier:

diskutil apfs deleteContainer disk0s2

You should get the following message: Finished APFS operation on disk0s2

diskutil eraseVolume JHFS+ SSD disk0s2

You should get the following message: Finished erase on disk0s2 SSD

(2) Now run this command to erase TarDisk (use your TarDisk identifier):

diskutil eraseDisk JHFS+ SSD disk4

You should get the following message: Finished erase on disk4

*Please note that your volume identifiers might differ from ours (disk0s2 and disk4), as mentioned in the previous step.

Create a CoreStorage Fusion Group

After erasing the disks in the previous step, type the following command (don't forget to use the right volume identifiers assigned to each of your drives) and press enter:

- disk0*: the first entry should be your internal drive identifier, and;

- disk4: the second entry should be the TarDisk identifier.

diskutil cs create "Macintosh HD" disk0 disk4

You should get the following message: Finished CoreStorage operation

* Note that we did not use disk0s2 for the Apple_APFS container, but disk0. That is because we are choosing the whole disk, not only the Apple_APFS Container (disk0s2). So if your Apple_APFS container has disk1s2 assigned to it, use disk1; if disk2s2 use disk2; if disk3s2 use disk3; and so on.

Create a CoreStorage Fusion Volume

Type the following command:

diskutil cs createVolume "Macintosh HD" JHFS+ "Macintosh HD" 100%

Diskutil Internal List

You will know it is done when you get the message Finished CoreStorage operation.

Quit Terminal

Once completed, quit Terminal. On the top navigation bar click Terminal, than click "Quit Terminal" or just type ⌘ + Q.

Restore from a Time Machine backup

Once back to the "OS X Utilities screen". Click Restore From Time Machine Backup.

Mac OS X Utilities


You will be shown how much space you have created by Pearing. Your Macintosh HD will now show the size of both volumes combined. If further assistance is needed, please follow instructions for Troubleshooting a Peared TarDisk or send us an email ( We are happy to assist!