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.
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:
In addition to a Time Machine backup, a cloud backup option like this one can be used.
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 drive, leave only TarDisk.
Boot into Recovery Mode
With the TarDisk plugged in, restart your computer into Recovery Mode:
(1) First, turn off your Mac by pressing and holding the power button for a few seconds.
(2) Once it's off, press the power button once to turn your Mac back on. 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.
From the Menu Bar of the "OSX Utilities Screen", click on Utilities and choose Terminal.
Use the diskutil list internal command to identify your internal drive and TarDisk.
Type diskutil list internal in Terminal and press enter/return. You should get results similar to these:
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
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
If you get a message stating "The target disk is in use by APFS as a Physical Store", then run:
diskutil apfs deleteContainer disk0s2
Once it's done, you can try running diskutil eraseVolume JHFS+ SSD disk0s2 again.
Now run this command to erase TarDisk:
diskutil eraseDisk JHFS+ SSD disk4
*Please note that your volume identifiers might differ from ours (disk0s2 and disk4), as mentioned in the previous step.
You will know it is done once you get the following messages after running each of the commands:
Finished erase on disk0s2 SSD
Finished erase on disk0s1
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:
diskutil cs create "Macintosh HD" disk0 disk4
*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. disk2s2 use disk2, disk3s2 use disk3 and so on.
Create a CoreStorage Fusion Volume
Type the following command:
diskutil cs createVolume "Macintosh HD" JHFS+ "Macintosh HD" 100%
You will know it is done when you get the message "Finished CoreStorage operation".
Once completed, quit terminal by clicking the red "X" in the top left hand corner of the Terminal Window.
Restore from a Time Machine backup
Once back to the "OS X Utilities screen". Click Restore From Time Machine Backup.
You will be shown how much space you have created by Pearing. Your Macintosh HD will now show two HD volumes, however both volumes will show the combined size of the two.
If further assistance is needed, please follow instructions for Troubleshooting a Peared TarDisk or send us an email (firstname.lastname@example.org). We are happy to assist!